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.
Mohan, the son of my friend, (P) gave me a set of pens (Q) which is very precious (R) while working in Japan (S) who died in an accident
The proper sequence should be :

Options

A. PQRS
B. SRPQ
C. RSPQ
D. SPQR