Match the reagents in Group I with their preferred cleavage sites in Group II.

Group I	Group II
P. Cyanogen bromide	1. Carboxyl side of methionine
Q. o-Iodosobenzoate	2. Amino side of methionine
R. Hydroxylamine	3. Carboxyl side of tryptophan
S. 2-Nitro-5-thiocyanobenzoate	4. Amino side of cysteine
	5. Asparagine-glycine bonds

A. P-1, Q-3, R-5, S-4

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

C. P-1, Q-2, R-5, S-4

D. P-4, Q-2, R-5, S-3

Answer: Option A