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| List-I | List-II |
|---|---|
| A. Acid Rain | 1. Chlorofluoro-carbon |
| B. Photochemical Smog | 2. Carbon Monoxide |
| C. Combination with Haemoglobin | 3. Sulphur dioxide |
| D. Depletion of Ozone Layer | 4. Unsaturated Hydrocarbons |
Code :
| A | B | C | D | |
|---|---|---|---|---|
| (a) | 1 | 2 | 3 | 4 |
| (b) | 3 | 2 | 4 | 1 |
| (c) | 3 | 4 | 2 | 1 |
| (d) | 1 | 3 | 2 | 4 |
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