2023

• Statement 1 is correct. The Jhelum flows into and out of Wular Lake in Kashmir, which acts as a natural flood absorption basin for the river.
• Statement 2 is incorrect. Kolleru Lake lies between the Krishna and Godavari deltas and is fed principally by the Budameru and Tammileru streams, with only seasonal spill connection to the deltas. The Krishna does not directly feed it.
• Statement 3 is the decisive one. Kanwar Taal, also written Kabartal, in Begusarai district of Bihar is an oxbow lake formed by the meandering of the Burhi Gandak, which is a separate river from the Gandak. On that reading only statement 1 is correct, giving (a).
• Option (b) would follow if the examiner treated Gandak and Burhi Gandak as interchangeable, (c) is ruled out by the Kolleru error, and (d) is ruled out because the Jhelum and Wular relationship is textbook.

• Pair 1 is correct. Kamarajar Port, formerly Ennore, was the first major port in India to be incorporated as a company under the Companies Act rather than run by a Port Trust.
• Pair 2 is correct. Mundra in Gujarat, operated by Adani Ports, is the largest privately owned and largest overall cargo handling port in the country.
• Pair 3 is incorrect. The largest container handling port in India is Jawaharlal Nehru Port, Nhava Sheva, not Visakhapatnam, which is a large bulk and general cargo port. Two pairs therefore match, giving (b).
• Option (a) understates, (c) requires the container claim to be true, and (d) is ruled out by the two clearly correct pairs.

• Statement 1 is correct. India has roughly 155 to 160 million hectares of arable land against about 120 million hectares in China, a consequence of India's much larger share of cultivable plain relative to its total area, while a large part of China is desert, plateau and mountain.
• Statement 2 is incorrect. China irrigates a higher share of its cultivated area than India does, in the region of half or more against India's figure of around 45 to 50 per cent.
• Statement 3 is incorrect. Chinese yields per hectare exceed Indian yields across most major crops, notably rice, wheat and cotton, on account of higher fertiliser and mechanisation intensity and better assured irrigation. Only statement 1 stands, giving (a).
• Options (b) and (c) require the irrigation or yield claim to hold, and (d) is ruled out by the arable area comparison.

• Statement 1 is incorrect. Amarkantak in Madhya Pradesh lies where the Vindhya, Satpura and Maikal ranges meet, and is the source region of the Narmada and Son. The Sahyadri is the Western Ghats and is nowhere near it.
• Statement 2 is incorrect. The Biligirirangan Hills lie in southern Karnataka and form a link between the Western Ghats and the Eastern Ghats, not any part of the Satpura, which is a central Indian range.
• Statement 3 is incorrect. The Seshachalam Hills are in Andhra Pradesh and belong to the Eastern Ghats, and are known for red sanders. The southernmost extent of the Western Ghats is around the Agasthyamalai and the Cardamom Hills. All three fail, giving (d). Any of (a), (b) or (c) would require at least one of these misplacements to be accepted.

• Statement 1 is incorrect on two counts. The East West Corridor is part of the North South and East West Corridor component of the National Highways Development Project, which is distinct from the Golden Quadrilateral, and it runs from Silchar to Porbandar, not Dibrugarh to Surat.
• Statement 2 is incorrect. The India Myanmar Thailand Trilateral Highway runs from Moreh in Manipur through Myanmar to Mae Sot in Thailand, not Chiang Mai.
• Statement 3 is incorrect. The BCIM Economic Corridor was conceived to link Kolkata with Kunming through Bangladesh and Myanmar, and Varanasi has no part in its alignment. All three fail, giving (d). The other options each require one of these three misdescriptions to pass.

• Statement I is correct. Coal supplies roughly seventy per cent of India's electricity generation while nuclear power contributes around three per cent, notwithstanding domestic uranium in Jharkhand and Andhra Pradesh.
• Statement II is incorrect and is the crux of the question. Power reactors run on low enriched uranium of about three to five per cent uranium-235, and India's indigenous pressurised heavy water reactors use natural uranium at 0.7 per cent because heavy water moderation removes the need for enrichment altogether. Enrichment to sixty per cent and above belongs to the weapons and high performance research reactor domain, not electricity generation. Since Statement I is correct and Statement II is false, (c) follows.
• Options (a) and (b) require Statement II to be true, and (d) inverts the truth values.

• Statement I is correct. Marsupials occur naturally in Australasia and the Americas, the opossums being the American representatives, and none is native to India. Their distribution is explained by the break up of Gondwana and the subsequent isolation of Australia rather than by any Indian habitat.
• Statement II is incorrect. Marsupials occupy an enormous range of habitats including deserts, tropical rainforest, woodland, wetland and urban edges, and they coexist with predators such as dingoes, quolls, raptors and snakes. The restriction to predator free montane grassland is invented.
• Statement I correct and Statement II false gives (c).
• Options (a) and (b) need Statement II to be true, and (d) inverts both.

• Statement 1 is incorrect. Indian squirrels, principally the Indian palm squirrel and the giant squirrels, are arboreal and build leaf and fibre nests called dreys in trees or in cavities and building crevices. Ground burrowing is characteristic of ground squirrels and marmots elsewhere, not of the Indian species.
• Statement 2 is correct. Squirrels practise scatter hoarding, burying nuts and seeds at many shallow sites, a behaviour of ecological importance because forgotten caches germinate and the animals become seed dispersers.
• Statement 3 is correct. Squirrels are omnivorous, taking fruit, seeds, bark, flowers, and also insects, eggs and occasionally nestlings. Two statements stand, giving (b).
• Option (c) fails on the burrowing claim and (d) is ruled out by the caching and diet statements.

All three describe recognised classes of extremophiles.

• Statement 1 is correct. Hyperthermophilic archaea at deep sea hydrothermal vents, such as Pyrolobus fumarii and Methanopyrus, grow above 100 degrees Celsius because the high hydrostatic pressure at those depths raises the boiling point of water and their proteins and membranes are thermostable.
• Statement 2 is correct. Psychrophiles grow in polar brines and sea ice at sub zero temperatures, aided by antifreeze proteins and by the depressed freezing point of saline water.
• Statement 3 is correct. Acidophiles such as Acidithiobacillus and Picrophilus thrive below pH 3 in acid mine drainage and volcanic springs, maintaining near neutral cytoplasm through proton pumping.

Hence (c), and (a), (b) and (d) each require one of these well documented groups to be denied.

Hydrofluorocarbons were introduced as ozone safe replacements for chlorofluorocarbons and hydrochlorofluorocarbons, and their recognised applications are refrigeration and air conditioning, aerosol propellants, foam blowing agents, fire suppression and solvents.

• Items 1, 2 and 3 therefore qualify.
• Item 4 does not. Lubricants used in refrigeration systems are polyol esters and mineral oils that work alongside HFC refrigerants, but HFCs are not themselves lubricant constituents, and the standard UNEP and Kigali listings of HFC end uses do not include lubricants. Three of four gives (c).
• Option (d) requires the lubricant claim, and (a) and (b) understate the well established aerosol, foam and fire suppression uses.

• Statement I is incorrect because it reverses the actual tax treatment. Interest distributed by an InvIT to unit holders is taxable in the hands of the unit holder, the trust itself enjoying pass through status, whereas dividend distributed is exempt for the unit holder where the special purpose vehicle has not opted for the concessional corporate tax regime.
• Statement II is correct. The SARFAESI framework was extended so that InvITs and REITs are recognised as borrowers, which allows lenders to enforce security against them and thereby improves their access to debt.
• Statement I false and Statement II true gives (d).
• Options (a) and (b) require the reversed tax claim to be accepted, and (c) inverts both.

• Statement I is correct as a matter of record. The Federal Reserve, the European Central Bank, the Bank of England and the Reserve Bank of India all raised policy rates through 2022 and into 2023 in response to inflation driven by supply disruption, pandemic era stimulus and the energy shock following the Ukraine conflict.
• Statement II is correct as a statement of the operating assumption of inflation targeting central banking, namely that raising the policy rate compresses demand through the credit, asset price and expectations channels and thereby slows price rises.
• Statement II also explains Statement I directly, because it is precisely that belief that motivates the hikes, so the correct choice is (a) rather than (b).
• Options (c) and (d) require one statement to be false, and neither is.

• Statement I is correct. Emissions trading systems and crediting mechanisms are expanding rapidly, covering the European Union, China, Korea and several subnational jurisdictions, with Article 6 of the Paris Agreement and India's own Carbon Credit Trading Scheme extending the model further.
• Statement II is the disputed limb. The official key treats it as correct, presumably on the reasoning that in a cap and trade system the State creates and auctions allowances and captures the auction revenue, which is a transfer from private emitters to the exchequer. On that reading both statements are correct but the second is not the reason the first is true, since the appeal of carbon markets lies in least cost abatement rather than in revenue transfer, which yields (b).
• Option (a) fails because no explanatory link holds, (c) requires Statement II to be rejected outright, and (d) requires Statement I to be false, which it is not.

Small Farmer Large Field is an aggregation model, developed in Vietnam and promoted through the International Rice Research Institute, in which smallholders retain ownership of their individual plots but coordinate operations such as land preparation, sowing date, variety choice, irrigation scheduling and harvesting so that the fragmented holdings behave functionally as one large field. The gain is economies of scale in machinery use, input procurement and marketing without any transfer of land. That is what (b) describes.

• Option (a) describes refugee resettlement with collective farming, which is a land settlement scheme rather than an aggregation model.
• Option (c) describes land leasing or corporate land pooling, in which farmers surrender possession, which SFLF specifically avoids.
• Option (d) describes contract farming, in which the buyer supplies inputs and credit against an assured supply obligation, a distinct arrangement.

Hence (b).

• Statement 1 is correct. Niger seed is one of the twenty three crops for which the Commission for Agricultural Costs and Prices recommends a Minimum Support Price, and it sits within the nine oilseeds in that list.
• Statement 2 is correct. Niger is a rain fed kharif oilseed sown with the onset of the monsoon, grown largely on marginal and hilly land in Odisha, Madhya Pradesh, Chhattisgarh, Maharashtra, Jharkhand and Andhra Pradesh.
• Statement 3 is correct. Niger seed oil is a traditional cooking medium among tribal communities in central and eastern India, and the crop is closely associated with tribal and shifting cultivation systems, which is precisely why it retains MSP coverage despite its small share of national oilseed output. All three stand, giving (c), and (a), (b) and (d) each require one of these to be denied.

Due process of law is the American doctrine under which a court examines not merely whether a law was validly enacted and followed but whether the law itself, and the procedure it lays down, is just, fair and reasonable. In substance that is the principle of natural justice, embracing the right to a hearing, the rule against bias and the requirement of reasoned decision making, which is the basis of the official answer (a).

• Option (b), procedure established by law, is the contrasting Indian doctrine drawn from the Japanese Constitution and adopted in Article 21, under which a court asks only whether the prescribed procedure was followed, though Maneka Gandhi read fairness into it and narrowed the gap.
• Option (d), equality before law, belongs to Article 14 and is a distinct guarantee.
• Option (c), fair application of law, is the closest competitor to the key, but application concerns how an existing law is enforced, whereas due process reaches the content and fairness of the law itself.

• Statement I is correct. Prisons, reformatories and allied institutions are Entry 4 of the State List, so States frame their own prison manuals and rules and run day to day administration, with the Union confined to advisory work such as the Model Prison Manual and the Model Prisons and Correctional Services Act.
• Statement II is correct. The Prisons Act of 1894 is the governing colonial statute still substantially in force, and it placed prison administration under provincial governments, an allocation carried forward by the Government of India Acts of 1919 and 1935 and then by the Seventh Schedule of the Constitution.
• Statement II also explains Statement I, because the present State control of prisons is the direct inheritance of that statutory arrangement, so the answer is (a) rather than (b).
• Options (c) and (d) require one of the two statements to be false, and neither is.

The defining function of a constitution in constitutional theory is to constitute government and simultaneously to limit it, so that power is exercised only through defined organs and within defined bounds, with judicial review and fundamental rights as the enforcement devices. That is (c).

• Option (a) is too narrow, since a constitution supplies the framework for lawmaking rather than merely the objectives of laws, a function closer to the Directive Principles.
• Option (b) captures only the constitutive half and omits the limiting half, which is the more distinctive purpose and the reason the answer is not (b).
• Option (d) describes the substantive goals of a particular kind of constitution, and many constitutions historically pursued no such goals, so it cannot be the chief purpose of a constitution as such.

• Statement 1 is incorrect. Article 71(2) expressly saves acts done by the President in the exercise of the powers of the office before the date of a decision declaring the election void, which protects governmental continuity.
• Statement 2 is incorrect. Article 62(1) requires the election to fill a vacancy caused by expiry of the term to be completed before the expiry, and Article 71(4) provides that the election cannot be questioned on the ground that the electoral college was incomplete for any reason, so dissolved Assemblies furnish no ground for postponement.
• Statement 3 is incorrect. The Constitution prescribes no time limit for the President to declare assent to a Bill under Article 111, the only temporal direction being that a Bill returned and passed again must be assented to, and that a return must be as soon as possible, which is not a limit. All three fail, giving (d).

• Statement 1 is correct. A Finance Bill in the ordinary sense, meaning one that is not certified as a Money Bill, is treated as an ordinary Bill so far as the Rajya Sabha is concerned, and the Upper House may amend or reject it.
• Statement 2 is correct and states the Article 109 procedure: the Rajya Sabha must return a Money Bill within fourteen days with recommendations only, which the Lok Sabha may accept or reject, and the Bill is deemed passed in either event.
• Statement 3 is incorrect, and the error lies in the word necessary. There is indeed no joint sitting for a Money Bill, since the deadlock mechanism does not arise. For a Finance Bill of the ordinary kind a joint sitting under Article 108 is available, but it is a discretionary power of the President to summon one, not a compulsory step. Two statements stand, giving (b).
• Option (c) requires the joint sitting to be mandatory, and (a) and (d) deny the settled Article 109 position.

Community Reserves were introduced by the 2002 amendment to the Wild Life Protection Act as Sections 36C and 36D, covering private or community land where a community or an individual volunteers to conserve wildlife.

• Statement 1 is clearly incorrect. The governing authority is the Community Reserve Management Committee constituted under Section 36D, comprising village representatives and the concerned Forest or Wildlife Warden as member secretary, not the Chief Wildlife Warden.
• Statement 2 follows from Section 36C(2), which applies the sanctuary provisions on hunting mutatis mutandis, so hunting is prohibited.
• Statement 3 reflects the fact that the reserve is declared over land whose existing use continues, and collection of non timber forest produce is not extinguished by the declaration.
• Statement 4 follows from Section 36D(2), which bars change in land use pattern except by resolution of the Management Committee with State approval, thereby preserving existing agricultural practice. On that reading three statements are correct and the answer would be (c). The official key at (b) accepts only two.

• Statement 1 is correct. Paragraph 6 of the Fifth Schedule empowers the President to declare an area to be a Scheduled Area, and to alter or rescind such declaration, by order.
• Statement 2 is correct. In practice Scheduled Areas are demarcated with the district as the largest unit and clusters of villages within a block as the smallest, following the criteria of preponderance of tribal population, compactness and reasonable size, and economic backwardness relative to neighbouring areas.
• Statement 3 is incorrect and is the decisive error. Paragraph 3 of the Fifth Schedule places the reporting duty on the Governor of the State, who reports annually or whenever required to the President, not on the Chief Minister and not to the Union Home Ministry. Two statements stand, giving (b).
• Option (c) requires the reporting channel to be misdescribed, and (a) and (d) deny the presidential order or the demarcation practice.

• Statement I is correct. From Indra Sawhney onward, and again in Nagaraj and Jarnail Singh, the Supreme Court has read Article 335 as a limiting consideration on reservation under Article 16(4), holding that claims of Scheduled Castes and Scheduled Tribes must be taken into consideration consistently with the maintenance of efficiency of administration.
• Statement II is incorrect. Article 335 uses the expression but supplies no definition of it, which is precisely why the content of efficiency of administration has been contested and judicially elaborated, most notably in Jarnail Singh where the Court rejected a narrow merit based reading.
• Statement I correct and Statement II false gives (c).
• Options (a) and (b) require Article 335 to contain a definition it does not contain, and (d) denies a settled line of authority.

• Statement 1 is incorrect and is the discriminator. The stupa derives from the pre Buddhist funerary tumulus, the earthen burial mound raised over the remains of the dead, a practice referred to in Vedic literature and found in megalithic contexts. Buddhism adopted and elaborated the form rather than originating it, and Jainism used it as well.
• Statement 2 is correct. The classic stupa enshrines relics, whether corporeal remains of the Buddha or a disciple, or objects used by them, which is the basis of the distinction between sharirika and paribhogika stupas.
• Statement 3 is correct. Stupas were also raised as votive offerings by pilgrims and as commemorative markers at sites associated with events in the Buddha's life, giving rise to the further categories of uddesika and votive stupas. Two statements stand, giving (b).
• Option (c) requires Buddhist origin to be accepted, and (a) and (d) deny the relic and commemorative functions that define the form.

Vattakirutal, also written vadakkiruttal meaning sitting facing north, was the Sangam era practice by which a king who had been defeated, dishonoured or bereaved of a close companion fasted to death seated facing north, a ritual self immolation by starvation that preserved honour. It is recorded of Chera and Pandya rulers in the Purananuru.

• Option (a) refers to a separate courtly practice noted in later sources but not to this term.
• Option (b) describes the scholarly assembly, associated with the Sangam academies themselves.
• Option (c) describes the tinai motif of girls guarding millet fields, a recurrent image in Sangam love poetry but a different practice altogether.

Hence (d).

• Pair 1 is incorrect. Devichandraguptam is a Sanskrit play attributed to Vishakhadatta, who also wrote Mudrarakshasa. Bilhana wrote the Vikramankadevacharita in praise of the Chalukya Vikramaditya the Sixth.
• Pair 2 is correct. Hammira Mahakavya was composed by the Jaina scholar Nayachandra Suri in the fifteenth century on Hammira of Ranthambhor.
• Pair 3 is incorrect. Milindapanha is a Pali dialogue between the Indo Greek king Menander and the monk Nagasena, and it is Nagasena rather than Nagarjuna who is the interlocutor. Nagarjuna was the Madhyamaka philosopher of a later period, and the similarity of the two names is the trap.
• Pair 4 is correct. Nitivakyamrita is a work on polity by Somadeva Suri, author also of Yashastilaka. Two pairs match, giving (b).

• Statement 1 is incorrect. Janani Suraksha Yojana is a centrally sponsored scheme launched in 2005 under the National Rural Health Mission, now the National Health Mission, and is fully funded by the Centre for cash assistance even though States implement it. Describing it as an intervention of the State Health Departments misplaces its origin.
• Statement 2 is correct, since the scheme targets reduction of maternal and neo natal mortality.
• Statement 3 is correct and states the central mechanism of the scheme, namely conditional cash transfer to promote institutional delivery among poor pregnant women, with differential entitlements for low performing and high performing States and for rural and urban areas.
• Statement 4 is incorrect and is the trap. Free treatment for sick infants up to one year of age belongs to the Janani Shishu Suraksha Karyakram of 2011, a separate initiative that provides free delivery, drugs, diagnostics, diet and transport. Two statements stand, giving (b).

• Statement 1 is incorrect and turns on a single word. Anaemia Mukt Bharat provides prophylactic iron and folic acid supplementation, not calcium, across its six target groups. Calcium supplementation exists in maternal health programming but is not the anaemia intervention.
• Statement 2 is correct. Delayed cord clamping, holding the clamp for at least one to three minutes after birth, allows placental transfusion to the newborn and improves infant iron stores, and it is one of the six interventions in the six by six by six strategy.
• Statement 3 is correct, periodic deworming being included because helminth infestation causes chronic blood loss and impairs iron absorption.
• Statement 4 is correct, the strategy explicitly addressing non nutritional causes in endemic pockets with focus on malaria, haemoglobinopathies such as sickle cell disease and thalassaemia, and fluorosis. Three of four gives (c), and (d) requires the calcium error to pass.

• Statement 1 is correct. Carbon fibre reinforced polymers combine very high specific strength and stiffness with low density and fatigue resistance, which is why they are used in aircraft primary structures, in automotive body panels and chassis components, and in wind turbine blades and pressure vessels.
• Statement 2 is incorrect. Carbon fibre composites are recycled at commercial scale, principally by pyrolysis in which the polymer matrix is thermally decomposed and the fibres recovered, and also by solvolysis and mechanical grinding. The recovered fibres are shorter and lose some strength, so the process is downcycling rather than closed loop recovery, but recycling certainly occurs. Only statement 1 stands, giving (a).
• Options (b) and (c) require the recyclability claim to be denied, and (d) denies an obvious use.

• Statement 2 is the clearest and is certainly correct. The biofilter houses nitrifying bacteria, Nitrosomonas oxidising ammonia to nitrite and Nitrobacter oxidising nitrite to nitrate, which converts highly toxic ammonia excreted across the gills into relatively harmless nitrate and is the reason a recirculating system can hold high stocking densities on little water.
• Statement 3 is incorrect. Biofilters do not add phosphorus, and phosphorus is not a nutrient fish take up from water in any case, being supplied through feed. Excess phosphorus in the effluent is a pollution problem to be removed, not a benefit.
• Statement 1 is the loose one. Strictly, uneaten feed and faeces are solids removed by mechanical filtration through screens, settling and drum filters, while the biofilter handles dissolved wastes. The official key at (b) accepts statement 1, evidently reading biofilter in the broad sense of biological waste treatment within the system. On that reading statements 1 and 2 stand and (b) follows, with (c) ruled out by the phosphorus claim.

• Pairs 1 and 2 are straightforwardly swapped, which is the whole design of the question. Cepheids are variable stars that brighten and dim with a regular period, and because the period is tightly related to intrinsic luminosity through the Leavitt law they serve as standard candles for measuring extragalactic distances. Nebulae are the giant clouds of dust and gas. So pair 1 is wrong and pair 2 is wrong, each carrying the other's description.
• Pair 3 is accepted as correct. A pulsar is indeed a neutron star produced by the core collapse of a massive star that has exhausted its nuclear fuel. Only one pair matches, giving (a).

Both statements are reversed, which makes this a straightforward elimination once the basic distinction is held.

• Statement 1 is incorrect. A ballistic missile is rocket powered only during the boost phase and thereafter follows a free ballistic trajectory through mid course and re entry, reaching hypersonic speeds. A cruise missile is air breathing and jet propelled through most of its flight, sustaining powered aerodynamic flight at low altitude, and many are subsonic.
• Statement 2 is likewise reversed. Agni-V is a solid fuelled long range ballistic missile in the intercontinental class, while BrahMos is a supersonic cruise missile with a ramjet sustainer. Neither statement stands, giving (d).

• Statements 1 and 2 are not in dispute. Artisanal and small scale gold mining, where mercury is used to amalgamate gold and then burned off, is the single largest anthropogenic source of mercury release globally, which is why it receives a dedicated annex in the Minamata Convention. Coal contains trace mercury that is volatilised on combustion, making coal fired power the largest source of atmospheric mercury emissions from the industrial sector.
• Statement 3 is the disputed limb. It is frequently asserted that no safe level of mercury exposure exists, and the World Health Organization treats mercury as one of the top chemicals of major public health concern. Against that, expert committees have set quantitative tolerable intakes, notably the provisional tolerable weekly intake for methylmercury, which presupposes a threshold below which harm is not expected. The official key at (b) rejects statement 3, presumably on that basis.
• Option (c) follows the no threshold reading, and (a) and (d) are untenable given the two undisputed sources.

All three describe established or demonstrated uses of hydrogen, and green hydrogen differs from other hydrogen only in its production route, namely electrolysis powered by renewable electricity, not in its end use chemistry.

• Statement 1 is correct, hydrogen internal combustion engines having been demonstrated in cars, buses and generator sets, burning hydrogen in a modified spark ignition engine.
• Statement 2 is correct, hydrogen being blended into natural gas grids at low percentages for heating and power, with trials in India and abroad.
• Statement 3 is correct, the proton exchange membrane fuel cell producing electricity directly from hydrogen and oxygen with water as the only exhaust, which is the basis of fuel cell electric vehicles. Hence (c). The question is generous in that each option is a well publicised application, and no elimination is needed.

• Option (c) is correct. Water vapour is the dominant absorber of infrared radiation in the atmosphere, with strong absorption bands in the infrared, and it is concentrated in the lower troposphere because its concentration falls steeply with temperature and hence with altitude. This is the physical basis of the natural greenhouse effect and of why humid nights cool less than dry ones.
• Option (a) is wrong on magnitude. Annual insolation at the equator exceeds that at the poles by a factor of roughly two and a half, not ten, since the poles receive continuous summer daylight which partly compensates for the very low solar elevation.
• Option (b) is wrong. Infrared accounts for roughly half of incoming solar energy, with visible light around forty per cent and ultraviolet under ten per cent, so two thirds overstates it.
• Option (d) is wrong by definition, infrared lying beyond the red end of the visible spectrum at longer wavelengths and therefore outside it.

• Statement I is incorrect, and this is one of the most productive counterintuitive facts in ecology. Tropical rain forest soils are typically poor, being deeply weathered, acidic and heavily leached oxisols and ultisols. Almost the entire nutrient capital of the system is held in the living biomass rather than in the soil, and it is recycled rapidly through a thin litter layer by a dense mat of surface roots assisted by mycorrhizal fungi. This is why clearance for agriculture yields only a few seasons of fertility.
• Statement II is correct. Continuously high temperature and moisture drive very rapid microbial decomposition, so litter does not accumulate as it does in temperate or boreal forests. Note that Statement II is in fact part of the reason Statement I is false, since rapid decomposition combined with heavy rainfall leaches released nutrients out of the profile before they can accumulate.
• Statement I false and Statement II true gives (d).

• Statement II is correct and is elementary. The specific heat capacity of water is roughly four to five times that of dry soil and rock, and water is further moderated by vertical mixing, transparency to solar radiation and evaporative cooling, so oceans heat and cool far more slowly than land.
• Statement I is incorrect, and this is the harder judgement. The land and sea thermal contrast in the middle and higher latitudes is greatest in winter, not summer, because continental interiors cool dramatically under long nights, snow cover and radiative loss, reaching values tens of degrees below the adjacent ocean, whereas in summer land warms above the ocean by a much smaller margin. The strength of the winter Siberian high against the relatively mild North Atlantic and North Pacific illustrates the point.
• Statement I false and Statement II true gives (d).
• Options (a) and (b) require the summer contrast to dominate, and (c) denies a settled physical property.

Both statements are correct.

• Statement 1 follows from the fact that P waves are the faster body waves, travelling at roughly six kilometres per second in the crust against about three and a half for S waves, so they arrive first, which is why they are called primary waves. The widening gap between the P and S arrivals with distance is used to locate the epicentre and is the basis of early warning systems.
• Statement 2 states the physical distinction correctly. P waves are longitudinal or compressional, with particle motion parallel to the direction of propagation through alternating compression and rarefaction, and they therefore propagate through solids, liquids and gases. S waves are transverse, with particle motion perpendicular to propagation, which requires shear rigidity and is why they cannot travel through the liquid outer core, producing the S wave shadow zone.

Hence (c).

All three statements are absolute negatives and each falls to a single counter example.

• Statement 1 is incorrect, since coastal thermal stations such as those in Tamil Nadu, Gujarat and Andhra Pradesh use seawater for once through condenser cooling, which is one of the reasons imported coal plants are sited on the coast.
• Statement 2 is incorrect, and this is a well documented concern: a substantial share of India's coal fleet sits in water stressed districts of Maharashtra, Telangana, Madhya Pradesh and Chhattisgarh, and plants have repeatedly shut down for want of cooling water.
• Statement 3 is incorrect, private ownership being substantial through Tata Power, Adani Power, JSW and others, alongside NTPC and State generating companies. None stands, giving (d). The sweeping word none in each statement is itself the strongest clue at the exam.

The term is built from its two parts. Metagenomics is the sequencing of genetic material recovered directly from an environmental sample rather than from a cultured or captured organism, and aerial specifies air as the medium. Aerial metagenomics therefore means filtering air and sequencing the environmental DNA it carries in shed skin, hair, spores, pollen and droplets, which allows an inventory of species present in a habitat without observing or trapping any of them.

• Option (b) confuses aerial with avian, a trap resting on the word association with birds.
• Option (c) describes remote biological sampling of blood, which involves neither air as a medium nor metagenomic sequencing.
• Option (d) describes drone assisted field sampling, which uses aerial platforms but collects conventional physical samples from land and water rather than DNA from the air itself.

Microsatellites, also called short tandem repeats, are stretches of DNA in which a motif of one to six base pairs is repeated in tandem. They mutate rapidly by replication slippage, so the number of repeats at a locus varies greatly between individuals, and they are co dominant and distributed throughout the genome. That high polymorphism makes them standard markers for individual identification in forensic DNA profiling, for parentage and population genetics, and for inferring relatedness and divergence among populations and closely related species, which is what (a) describes.

• Option (b) concerns growth factors and differentiation signals in stem cell biology, unrelated to repeat markers.
• Option (c) concerns tissue culture and vegetative propagation techniques.
• Option (d) concerns clinical trial methodology and pharmacology.

Hence (a).

• Statement 1 is incorrect on any version of the definition. Under the MSMED Act as originally enacted in 2006, a medium manufacturing enterprise was one with investment in plant and machinery above five crore rupees and up to ten crore rupees. Under the revised composite criterion notified in 2020, a medium enterprise is one with investment up to fifty crore rupees and turnover up to two hundred and fifty crore rupees. The band of fifteen to twenty five crore rupees corresponds to neither.
• Statement 2 is correct. Under the Reserve Bank's priority sector lending guidelines, all bank loans to micro, small and medium enterprises qualify for priority sector classification, with sub targets prescribed for micro enterprises within the overall requirement. Only statement 2 stands, giving (b).

• Statement 1 is correct. A central bank digital currency settles directly on the issuing central bank's ledger, so bilateral or multilateral CBDC arrangements can clear cross border payments without routing through correspondent banking, dollar clearing or the SWIFT messaging network. This is precisely the strategic attraction for countries seeking insulation from dollar dependence and sanctions exposure, and it underlies projects such as mBridge.
• Statement 2 is correct and describes programmability, one of the distinguishing features of a CBDC over conventional bank deposits. Conditions can be embedded in the token, such as expiry dates, restriction to particular merchant categories or end use, which is being explored for targeted subsidy and welfare transfer. Both stand, giving (c).

Beta measures the sensitivity of a security's returns to movements in the market as a whole, and is the slope coefficient obtained by regressing the stock's returns on market returns. A beta of one means the stock moves with the market, above one means it amplifies market movements and is more volatile, and below one means it is defensive. It is the measure of non diversifiable market risk in the capital asset pricing model.

• Option (a) describes arbitrage, exploiting price differences across platforms.
• Option (b) describes portfolio construction or asset allocation generally.
• Option (c) describes basis risk, which arises when a hedge does not move perfectly with the underlying exposure.

Hence (d).

• Statement 1 is incorrect. The Self Help Group movement in India was pioneered by voluntary agencies, notably MYRADA in Karnataka, and was institutionalised by the National Bank for Agriculture and Rural Development, which launched the SHG Bank Linkage Programme as a pilot in 1992. The State Bank of India participates as a lending bank but did not initiate the programme.
• Statement 2 is correct and describes the joint liability principle that substitutes peer accountability for physical collateral, which is the core credit innovation of the model and the reason repayment rates are high.
• Statement 3 is correct, since Regional Rural Banks, scheduled commercial banks and cooperative banks all lend to SHGs under the linkage programme. Two statements stand, giving (b).

• Statement I is correct. Successive assessments, including the National Health Policy of 2017, have observed that public health spending and infrastructure are weighted towards curative and hospital based care, with comparatively weak investment in prevention, health promotion and rehabilitation, which is part of the rationale for the Health and Wellness Centre component of Ayushman Bharat.
• Statement II is also correct, public health and hospitals being Entry 6 of the State List, with the Centre acting through centrally sponsored schemes and national programmes while States organise and deliver services. The decisive judgement is the explanatory link. State responsibility for organising services does not by itself explain the curative bias, which arises from resource constraints, demand pressures, provider incentives and the political visibility of hospitals rather than from the federal division of responsibility. Both correct without an explanatory relation gives (b) rather than (a), and (c) and (d) each require one statement to be false.

• Statement I is correct. India is the largest extractor of groundwater in the world, accounting for roughly a quarter or more of global withdrawal, more than the United States and China combined.
• Statement II is incorrect, and the error is in the stated purpose rather than in the quantity. Around eighty to ninety per cent of India's groundwater extraction goes to irrigation, not to drinking water and sanitation, a pattern driven by tubewell expansion, subsidised or free power for pumping and the cropping choices encouraged by procurement. Domestic and industrial use together account for a small fraction. The scale of extraction is therefore explained by agriculture, and the drinking water justification offered in Statement II does not hold.
• Statement I correct and Statement II false gives (c).
• Options (a) and (b) require the domestic use explanation to be accepted, and (d) denies the reported extraction share.

• Statement 1 is correct. Article 355 places on the Union the duty to protect every State against external aggression and internal disturbance and to ensure that State government is carried on in accordance with the Constitution.
• Statement 2 is correct. Article 22(1) guarantees the right to consult and be defended by a legal practitioner of choice, but Article 22(3)(b) expressly excludes persons detained under preventive detention law from the protections of clauses (1) and (2), so the constitutional entitlement to counsel does not extend to them.
• Statement 3 is incorrect and is the decisive error. Section 32 of the Prevention of Terrorism Act of 2002 made a confession recorded before a police officer of the rank of Superintendent or above admissible in evidence, a departure from Sections 25 and 26 of the Evidence Act, and this was among the most criticised features of the law before its repeal in 2004. Two statements stand, giving (b).

• Statement 1 is correct. The Nagoya Protocol on access to genetic resources and the fair and equitable sharing of benefits rests on prior informed consent and mutually agreed terms at the point where resources and associated traditional knowledge are actually held, which in India is the local community. Biodiversity Management Committees, constituted at panchayat and municipal level under the Biological Diversity Act of 2002, are the institutional expression of that principle and maintain the People's Biodiversity Registers that document local resources and knowledge.
• Statement 2 is correct. The Act and the rules made under it empower BMCs to be consulted on access decisions and to levy collection fees for the access to biological resources within their jurisdiction, which is the mechanism by which benefit sharing reaches the local level. Both stand, giving (c).

• Statement 1 is incorrect. Nominated members of either House of Parliament and of State Legislative Assemblies are excluded from the Electoral College, since they are not elected, and members of Legislative Councils are excluded as well.
• Statement 2 is incorrect, and it inverts the formula. The value of an MLA's vote is the State population of the 1971 census divided by the number of elective Assembly seats, divided again by one thousand. The seat count is in the denominator, so for a given population a larger Assembly means a lower value per MLA, not higher.
• Statement 3 is incorrect. The value of an MLA's vote in Madhya Pradesh is 131 while in Kerala it is 152, so Kerala's is the greater.
• Statement 4 is correct and applies the formula properly. Puducherry's value is 16 against 8 for Arunachal Pradesh, and the reason given is exactly right, since the two had similar 1971 populations but Puducherry has thirty elective seats against Arunachal's sixty, making the population to seats ratio roughly double. Only one statement stands, giving (a).

• Pair 1 is incorrect. Besnagar near Vidisha in Madhya Pradesh is celebrated for the Heliodorus pillar, a Garuda column erected by a Greek ambassador of Taxila who described himself as a Bhagavata, making the site a landmark of early Vaishnavism rather than a Shaivite cave shrine, and it is not a cave site at all.
• Pair 2 is correct. Bhaja in Maharashtra is an early Hinayana rock cut complex with a chaitya hall of the second century before the common era, its wooden ribbed vault and horseshoe arch showing the timber prototypes being translated into stone.
• Pair 3 is correct. Sittanavasal in Tamil Nadu is a Jaina rock cut cave temple noted for its Pandya period frescoes, particularly the lotus tank composition, often compared with Ajanta in technique. Two pairs match, giving (b).

• Statement I is correct. National Handloom Day has been observed on the seventh of August since 2015.
• Statement II is correct. The Swadeshi Movement was formally launched at a meeting in the Calcutta Town Hall on the seventh of August 1905, in response to the announcement of the partition of Bengal, with the boycott of foreign cloth as its central plank.
• Statement II is also the correct explanation for Statement I, since the date was chosen precisely to commemorate the Swadeshi launch and to link the modern handloom sector with the boycott of imported textiles and the revival of indigenous production. That explanatory link makes the answer (a) rather than (b).
• Options (c) and (d) each require one of two well documented dates to be wrong.

• Statement II is correct and is the well known requirement that the flag be rectangular in the proportion three to two of length to height.
• Statement I is incorrect, and the trap is that 600 by 400 does satisfy the three to two ratio, so a candidate reasoning only from proportion would accept it. The Flag Code prescribes a closed list of nine standard sizes in millimetres, running from 6300 by 4200 down through 3600 by 2400, 2700 by 1800, 1800 by 1200, 1350 by 900, 900 by 600, 450 by 300, 225 by 150 to 150 by 100. The dimension 600 by 400 is not among them, falling between the 900 by 600 and 450 by 300 entries. Satisfying the ratio is necessary but not sufficient for being a standard size.
• Statement I false and Statement II true gives (d).

• Statement I is correct. Constitution Day, or Samvidhan Divas, has been observed on the twenty sixth of November since 2015 to promote constitutional values, the date having previously been marked as Law Day.
• Statement II is incorrect and conflates two different events. The Drafting Committee under Dr Ambedkar was constituted on the twenty ninth of August 1947. What happened on the twenty sixth of November 1949 was the adoption of the Constitution by the Constituent Assembly, which is the reason the date is commemorated. The Constitution came into force on the twenty sixth of January 1950, celebrated separately as Republic Day.
• Statement I correct and Statement II false gives (c).
• Options (a) and (b) require the Drafting Committee date to be accepted, and (d) denies the observance itself.

• Statement I is correct. Switzerland is among the largest gold exporters by value, not because it mines gold, which it does not, but because it is the world's dominant refining centre, hosting several of the largest refineries which process a very large share of global gold and re export it in bar and semi finished form.
• Statement II is incorrect. The largest official gold reserves are held by the United States, followed by Germany, Italy and France, with Switzerland well down the list. The question is well designed because a candidate who knows only that Switzerland is associated with gold might accept both statements and further assume that large reserves explain large exports, whereas the real explanation is refining and entrepot trade.
• Statement I correct and Statement II false gives (c).

• Statement I is correct. The United States and the European Union established the Trade and Technology Council in 2021 as a forum to coordinate on technology standards, export controls, semiconductor supply chains, artificial intelligence governance, data governance and investment screening. India and the European Union subsequently set up a comparable council.
• Statement II is incorrect as a description of what the parties claim. The declared purpose is coordination of approaches, alignment of standards and strengthening of transatlantic supply chain resilience among democracies, not the assertion of control over technological progress and productivity. The wording of Statement II is the language of criticism attributed to the participants themselves, which is the error.
• Statement I correct and Statement II false gives (c).

• Statement I is incorrect. India's share of world merchandise exports is in the region of one point eight per cent, and it is in services trade that India's share is much larger, at roughly four per cent or more. The figure of three point two per cent for goods overstates India's position, and the contrast between the modest goods share and the strong services share is one of the defining features of India's external sector.
• Statement II is correct. Production Linked Incentive schemes covering fourteen sectors, most visibly mobile phone manufacturing, pharmaceuticals and white goods, have attracted both domestic firms and foreign manufacturers, and mobile phone exports in particular have risen sharply.
• Statement I false and Statement II true gives (d).
• Options (a) and (b) require the export share figure to be accepted, and (c) denies the observable uptake of the scheme.

• Statement 1 is correct and states the substance of the Pact, which is a fiscal rulebook adopted in 1997 to underpin monetary union by requiring member States to keep the general government deficit within three per cent of gross domestic product and public debt within sixty per cent, with an excessive deficit procedure for breaches. Without such a rule, individual members could run loose fiscal policy while the costs were spread across the shared currency.
• Statements 2 and 3 are incorrect. The Pact has nothing to do with sharing infrastructure or technology. Infrastructure coordination falls under instruments such as the trans European networks, and research and technology cooperation under framework programmes such as Horizon Europe. One statement stands, giving (a).

• Statement 1 is incorrect because of the word all. The Global Compact for Safe, Orderly and Regular Migration was adopted in Marrakesh in 2018 and endorsed by the General Assembly, but the United States withdrew from the process, and several States voted against or abstained, among them Hungary, Poland, the Czech Republic, Israel and Australia.
• Statement 2 is incorrect. The Compact is expressly non legally binding, resting on cooperation and a common understanding while reaffirming State sovereignty over migration policy, and this was the central point of contention for the States that declined it.
• Statement 3 is incorrect. The Compact deals with international migration. Internally displaced persons are addressed through the Guiding Principles on Internal Displacement and related frameworks, not through the GCM. None stands, giving (d).

• Statement 1 is incorrect. Home Guards are raised under the Home Guards Acts and Rules of the individual States and Union Territories, police and public order being State subjects. The Union Ministry of Home Affairs issues advisories, prescribes the model scheme and reimburses part of the expenditure, but the raising authority is the State.
• Statement 2 is correct. The Home Guards is a voluntary auxiliary force that supplements the police in maintaining internal security, assists in emergencies such as floods and fires, and helps with traffic and crowd management.
• Statement 3 is correct. Border Wing Home Guards Battalions have been raised in States bordering Pakistan, China, Bangladesh and Myanmar to serve as an auxiliary to the Border Security Force. Two statements stand, giving (b).

• Pair 1 is correct. Section 6 of the Official Secrets Act of 1923 penalises unauthorised use of uniforms, along with falsification of reports, forgery and personation, these being treated as means of gaining unauthorised access to prohibited places.
• Pair 2 is incorrect, and this is the discriminator. Knowingly misleading or interfering with a police or military officer engaged in duty is also dealt with under Section 6 of the Official Secrets Act, not under the Indian Evidence Act of 1872, which is a procedural statute governing what may be proved and how, and creates no such offence.
• Pair 3 is correct. The Arms Amendment Act of 2019 inserted a provision making celebratory gunfire that endangers human life or the personal safety of others a punishable offence, a response to deaths at weddings and festivities. Two pairs match, giving (b).

• Statement I is correct. Israel established relations with Egypt in 1979 and Jordan in 1994, and under the Abraham Accords of 2020 normalised relations with the United Arab Emirates, Bahrain and Morocco, with Sudan also moving towards normalisation.
• Statement II is incorrect. The Arab Peace Initiative was proposed by Crown Prince Abdullah of Saudi Arabia and adopted by the Arab League at the Beirut summit in 2002. It was an offer, conditioning full normalisation on Israeli withdrawal to the 1967 lines, the establishment of a Palestinian State with East Jerusalem as capital and a just settlement of the refugee question. Israel never accepted or signed it, so describing it as signed by Israel and the Arab League is wrong, and Saudi Arabia was its author rather than a mediator.
• Statement I correct and Statement II false gives (c).

• Pair 1 is correct. The Major Dhyan Chand Khel Ratna Award, the highest sporting honour, recognises the most spectacular and outstanding performance over the preceding four years.
• Pair 2 is incorrect. The Arjuna Award recognises consistently outstanding performance over four years together with qualities of leadership, sportsmanship and discipline, not lifetime achievement. Lifetime achievement is recognised by the Dhyan Chand Award.
• Pair 3 is correct, the Dronacharya Award honouring coaches who have produced outstanding sportspersons or teams.
• Pair 4 is incorrect and is the second discriminator. The Rashtriya Khel Protsahan Puraskar is given to corporate entities, public sector undertakings, sports control boards and other institutions for promoting sport, not to individual retired sportspersons, whose post retirement contribution again falls under the Dhyan Chand Award. Two pairs match, giving (b).

• Statement 1 is correct. The 44th Chess Olympiad, held at Mahabalipuram near Chennai in 2022, was the first time India hosted the event, having taken it over at short notice.
• Statement 2 is correct, the mascot being Thambi, a knight figure whose name means younger brother in Tamil.
• Statements 3 and 4 are both incorrect because the two trophies are interchanged. The Hamilton Russell Cup is awarded to the winner of the open section, having been donated in 1927, while the Vera Menchik Cup, named after the first women's world champion, goes to the winner of the women's section. Two statements stand, giving (b).
• Option (d) requires both trophy attributions to pass, and the swapped pair is the entire design of the question.

All four countries experienced successful military seizures of power in a short span, Mali in 2020 and again in 2021, Chad in 2021 following the death of President Deby, Guinea in 2021 and Sudan in 2021, part of a wider reversal of democratic transitions across the Sahel and West Africa that also touched Burkina Faso and Niger.

• Option (a) fails because rare earth discovery is not a shared feature of these four.
• Option (b) fails because China's only overseas military base in Africa is at Djibouti, which is not among them.
• Option (c) fails because although Sahel countries face desertification, that is a slow environmental process shared with many neighbours and was not the reason these four were in the news together.

Hence (d).

• Statement 1 is correct. The G-20 was created in 1999 in the wake of the Asian financial crisis as a forum of finance ministers and central bank governors to discuss international economic and financial stability. It was elevated to leaders' level only in 2008 in response to the global financial crisis, and the finance track continues alongside the sherpa track.
• Statement 2 is correct. Digital public infrastructure was a signature priority of India's presidency, with India presenting Aadhaar, the Unified Payments Interface and related systems as a replicable model and pressing for a global repository and financing support for developing countries. Both stand, giving (c).