Match the pollutant (s) in Column I with effect (s) in Column II.
| Column I | Column II |
| A. Oxides of Sulphur | 1. Red haze in traffic and congested areas |
| B. Nitrogen dioxide | 2. Damage to kidney |
| C. Lead | 3. ‘Blue baby’ syndrome |
| D. Nitrate in drinking water | 4. Respiratory diseases |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 2 | 3 |
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