Match the followings:

Component of flame safety lamp	Purpose of component
P. Asbestos ring	1. Dissipation of heat of flue gas
Q. Wire gauges	2. Formation of air-tight joints
R. Outer glass	3. Arrest of explosion inside the lamp
S. Combustion chimney	4. Separation of inlet air from flue gas

A. P-2, Q-1, R-3, S-4

B. P-4, Q-1, R-2, S-3

C. P-2, Q-4, R-3, S-1

D. P-1, Q-2, R-4, S-3

Answer: Option A