Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?

Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?

KGB, HLU, EQN, BVG, ?

A. ZYZ

B. YZZ

C. YZA

D. YAZ

Sol:

Pattern follows here is -3, +5, -7