UGC NET Questions (Paper – 1)

All four statements are correct and describe different aspects of air pollution and its management. PM2.5 and similar pollutants are harmful because they reach deep lung regions and may enter circulation. Vulnerable groups like children and the elderly face higher risks, and epidemiological studies link pollution to respiratory and cardiovascular problems. Air quality management combines regulatory, technological and behavioural measures. Therefore, the combination A, B, C and D is the correct answer.

Option A:
Option A is incorrect because it lists only A and B and omits C and D. While it acknowledges pollutant characteristics and vulnerable groups, it ignores the documented disease links and the multi-pronged strategy for control, so it is incomplete.

Option B:
Option B is incorrect as it includes A, B and C but leaves out D. Without mentioning management strategies such as emission standards and cleaner fuels, the option does not fully represent how societies respond to air pollution.

Option C:
Option C is incorrect since it includes B, C and D but excludes A. Statement A about PM2.5’s ability to penetrate deep into the lungs is fundamental to understanding health effects, so leaving it out makes the set partial.

Option D:
Option D is correct because it recognises that all four statements accurately reflect the science of air pollution and public health as well as key elements of control strategies. It is the only option that includes every true statement.

City HAPs typically include actions such as heat alerts issued in advance, training for health workers, mapping of vulnerable populations and setting up shaded or air-conditioned spaces for rest. They also promote simple behavioural measures like staying hydrated and avoiding strenuous activity during peak heat. These measures aim to reduce heat-related illness and mortality, especially among outdoor workers, the elderly and the urban poor.

Option A:
This option is incorrect because working during the hottest hours increases health risks and goes against HAP guidance.

Option B:
This option correctly describes a standard package of interventions found in many Heat Action Plans, combining early warning, communication and on-ground support.

Option C:
Reducing tree cover would remove natural shade and cooling, which is the opposite of what cities are advised to do.

Option D:
Avoiding water intake during heatwaves is dangerous; HAPs emphasise adequate hydration, not restriction.

Statements A, B, D and F are correct as they highlight safe water, sanitation, solid waste management and vulnerability of age groups. Statement C is wrong because handwashing with soap is highly effective in interrupting disease transmission. Statement E is also wrong, since environmental health includes both biological and chemical risks. Therefore, the combination A, B, D and F only is correct.

Option A:
Option A is incorrect because it includes C, which understates the importance of handwashing, and it omits F.

Option B:
Option B is incorrect as it includes E, which wrongly narrows environmental health to chemical issues.

Option C:
Option C is incorrect because it accepts E and omits A, denying safe water’s central role and limiting scope.

Option D:
Option D is correct since it selects A, B, D and F and excludes C and E.

Statements A, B, C and E are correct and collectively show the range of climate–health linkages. Heatwaves and shifting disease vectors affect health, climate-resilient planning strengthens systems and vulnerable groups face disproportionate risks. Statement D is wrong because air quality policies are central to climate mitigation and co-benefits, and F is wrong since health co-benefits are a strong argument for mitigation in policy debates. Therefore, the correct combination is A, B, C and E only.

Option A:
Option A is incorrect as it omits E, failing to acknowledge that certain social groups are more at risk. Without E, the distributional and equity dimensions of climate–health impacts are not reflected.

Option B:
Option B is incorrect because it includes D, which wrongly claims air quality is unrelated to climate policy. Including D introduces a serious conceptual error about the links between air pollution control and climate mitigation.

Option C:
Option C is incorrect since it comprises B, C, E and F, accepting F as if health co-benefits were irrelevant. In reality, such co-benefits are often used to justify stronger mitigation policies, so this option mixes correct and incorrect statements.

Option D:
Option D is correct as it assembles all the true statements and excludes the two clearly false ones. It reflects current understanding that climate change affects health through multiple pathways and that vulnerability and system resilience are key concerns.