When he
P : did not know
Q : he was nervous and
R : heard the hue and cry at midnight
S : what to do

The Proper sequence should be:

A. RQPS

B. QSPR

C. SQPR

D. PQRS

Answer: Option A

Solution(By Examveda Team)

When he heard the hue and cry at midnight he was nervous and did not know what to do.