Match the four starting materials (P, Q, R, S) given in List I with the corresponding reaction schemes (I, II, III, IV) provided in List II and select the correct answer using the code given below the lists.

Codes:

A

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

B

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

C

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

D

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