Match the chemical conversions in List I with the appropriate reagents in List II and select the correct answer using the code given below the lists:

A

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

B

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

C

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

D

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