Dear Lodger, I agree, the roof is leaking; but
P : there would be no need
Q : while it is raining
R : and when the sun shines,
S : I can't get it repaired

The Proper sequence should be:

A. PRQS

B. QRSP

C. RSPQ

D. SQRP

Answer: Option D

Solution(By Examveda Team)

Dear Lodger, I agree, the roof is leaking; but I can't get it repaired while it is raining and when the sun shines, there would be no need.