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?

AZX, CBZ, EDB, GFD, ?

A. IHF

B. IFH

C. FHI

D. JHF

Sol:

Pattern follows here is:

+2, +3, +2