By this time
P : at the railway station
Q : reported mass looting
R : reports of violence were flooding in
S : while police dispatches

The Proper sequence should be:

A. RSPQ

B. RSQP

C. SPRQ

D. SQRP

Answer: Option D

Solution(By Examveda Team)

By this time while police dispatches reported mass looting reports of violence were flooding in at the railway station.