Explanation:

Sol. Ans.(c).

The question is ‘Among four numbers P, Q, R and S, which one is LARGEST?’

S1 alone is not sufficient to answer the question, as it doesn’t talk about S.

S2 alone can’t be true as it says that S is not the largest, but doesn’t give any hint about R, P and Q.

By combining S1 and S2 we get – ‘there are four numbers P, Q, R and S; S cannot be largest; So largest number will be among P, Q and R but ‘R is greater than P and Q’, so R is the largest.

Hence, answer is (c).