In the following item, there is a sentence of which some parts have been jumbled up. You are required to rearrange these parts which are labeled P, Q, R and S, to produce the correct sentence. Choose the correct sequence and mark in your answer sheet accordingly.
The clerk (P) on the desk (Q) left the money (R) in the safe (S) which he should have locked up
The proper sequence should be :

Options

A. PQRS
B. RSPQ
C. QPRS
D. QPSR