Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
P_ _ N _ _ S R _ Q P_ R _ _ _ S _ N Q

A

S, R, Q, R, N, Q, N, S, P, R

B

S, R, Q, P, N, S, N, Q, P, R

C

R, S, Q, P, R, S, R, Q, P, N

D

Q, R, S, P, N, S, N, Q, P, R