Queue Arrangement Problem

Given Information:

1. Four people: P, Q, R, S.
2. Q is ahead of P.
3. R is between P and S.
4. S is at the end of the queue.

Reasoning:

1. S is at the end of the queue: This means S is the last person.
2. R is between P and S: Since S is last, and R is between P and S, the order must be P, R, S.
3. Q is ahead of P: This means Q comes before P. Combining this with the previous deduction, the order becomes Q, P, R, S.

Final Answer:

The correct option is (C) Q.