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?

AZZ, EB, KRE, SKI, ?

A. TMK

B. BCN

C. CBN

D. TCM

Sol:

Pattern follows here is: 3 series follow here