Match List I with List II and select the correct answer using the code given below the Lists : List I (Air Pollutant) A. Chlorofluorocarbon B. Sulphur dioxide layer in the atmosphere C. Lead compound D. Carbon dioxide List II (Effect) 1. Acid rain 2. Depletion in ozone 3. Harmful for human nervous system 4. Topmost contribution to greenhouse effect Code : A B CD

The matching of air pollutants to their effects is as follows: Chlorofluorocarbons (CFCs) are primarily responsible for the depletion of the stratospheric ozone layer. Sulphur dioxide (SO2) reacts with water and oxygen in the atmosphere to form acid rain [5]. Lead compounds, often emitted from vehicular and industrial sources, are heavy metals known to be harmful to the human nervous system [3]. Carbon dioxide (CO2) is the main greenhouse gas contributing most significantly to the greenhouse effect and global warming due to its high concentration from fossil fuel combustion [1]. Therefore, the correct sequence is A-2, B-1, C-3, D-4, which corresponds to Option 3.

Sources

1. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 17: Contemporary Issues > 1. Air Pollution > p. 38
2. [5] https://www.epa.gov/clean-air-act-overview/progress-cleaning-air-and-improving-peoples-health
3. [2] https://www.sciencedirect.com/topics/economics-econometrics-and-finance/ozone-pollution
4. [3] https://education.nationalgeographic.org/resource/air-pollution/
5. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 6: Environmental Degradation and Management > Consequences of Air Pollution > p. 39