The captain
P : when engaged against the enemy
Q : who was himself a brave man
R : never to lose heart
S : advised the soldiers

The Proper sequence should be:

A. PQSR

B. QPSR

C. QSRP

D. SQRP

Answer: Option C

Solution(By Examveda Team)

The captain who was himself a brave man advised the soldiers never to lose heart when engaged against the enemy.