Consider the following statements:

Assertion (A): LPG is a pollution free vehicular fuel.
Reason (R): Plying of CNG fuelled buses is recommended for metropolitan cities of India.

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 1999 (GS Paper I)