Civil Services Examination · Question 100

Consider the following: 1. Carbon monoxide 2. Nitrogen oxide 3. Ozone 4. Sulphur dioxide Excess of which of the above in the environment is/are cause(s) of acid rain?

1. A1, 2 and 3
2. B2 and 4 only
3. C4 only
4. D1, 3 and 4