Which of the following letter clusters will replace the question mark (?) in the given series to make it logically complete?
HLS, KJP, NHM, QFJ, ?

Logic: first position increasing by 3, second position decreasing by 2 and third position decreasing by 3.

H+3=K, K+3=N, N+3=Q, Q+3=T

L-2=J, J-2=H, H-2=F, F-2=D

S-3=P, P-3=M, M-3=J, J-3=G

So, Next number is TDG.

Thus, option D is correct.