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