In a large city, most of the air pollution comes from a fast-rising n…

The correct answer is Option (2) → Air pollution with special reference to vehicular pollution in urban cities; they are ground level sources with the maximum impact on the general population

Smoke from cars and two-wheelers in a city falls under the priority issue air pollution with special reference to vehicular pollution in urban cities. Vehicle emissions are ground level sources, so they have the maximum impact on the general population.

Option (1) Solid waste management; they rise to the stratosphere and deplete the ozone layer — Incorrect. Solid waste management deals with garbage, not smoke. Ozone depletion comes from chlorine and bromine compounds such as CFCs.

Option (2) Air pollution with special reference to vehicular pollution in urban cities; they are ground level sources with the maximum impact on the general population — Correct. Both parts are right.

Option (3) Air pollution with special reference to vehicular pollution in urban cities; they rise to the stratosphere and deplete the ozone layer — Incorrect. The issue is right, but the reason is wrong: the concern is that they are ground level sources.

Option (4) Biodiversity loss; they are ground level sources with the maximum impact on the general population — Incorrect. The reason is right, but biodiversity loss is the loss of plant and animal species, not air pollution.