Match the form of corrosion in Group 1 with the typical examples in Group 2.

Group 1	Group 2
P. Filiform corrosion	1. Austenitic stainless steel in chloride environment
Q. Crevice corrosion	2. Nut bolt with gasket
R. Galvanic corrosion	3. Painted food cans
S. Stress corrosion cracking	4. Steel studs in copper plate

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

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

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

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

Answer: Option A