Match the principle given in Group I with corresponding corrosion terminology in Group II.

Group I	Group II
P. Electrode polarization	1. Dezincification
Q. Passivity	2. Intergranular attack
R. Selective leaching	3. Over voltage
S. Grain boundary precipitation	4. Surface oxide film

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

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

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

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

Answer: Option A