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

Select the correct answer using the code given below:
Code:

A) Both A and R are true and R is the correct explanation of A

B) Both A and R are true but R is not the correct explanation of A

C) A is true but R is false

D) A is false but R is true

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2004 (GS Paper I)