Subject: PollutionXAcid Rain

Consider the following:
1. Oxides of Hydrogen
2. Oxides of Nitrogen
3. Oxides of Sulphur
Which of the above causes/cause acid rain ?

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 ?

Assertion (A): Coal-based thermal power stations contribute to acid rain.
Reason (R): Oxides of carbon are emitted when coal burns.

Acid rain is caused by the pollution of environment by