In the question below, there is a sentence of which some parts have been jumbled up. Rearrange these parts which are labelled P, Q, R and S to produce the correct sentence. Choose the proper sequence.

It was to be

P : before their school examination

Q : which was due to start

R : the last expedition

S : in a month's

The Proper sequence should be:

A.

SRQP

B.

RQSP

C.

RPQS

D.

SPRQ

Correct answer is C

No explanation has been provided for this answer.