Match the following:

P. Sensitization	1. Phosphating
Q. Sacrificial anode	2. Anodic protection
R. Nickel plating	3. Cathodic protection
S. Conversion coating	4. Stainless steel

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

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

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

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

Answer: Option C