Match the following.
| List-I (Pollutant) | List-II (Disease) |
| a. Carbon Monoxide | 1. Heart |
| b. Oxides of Nitrogen | 2. Cancer |
| c. Dust Particles | 3. Respiratory disease |
| d. Lead | 4. Central Nervous system |
A. a-2, b-3, c-4, d-1
B. a-4, b-3, c-2, d-1
C. a-1, b-2, c-3, d-4
D. a-4, b-3, c-1, d-2
Answer: Option C

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