Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

CMQR, BONV, AQKZ, ZSHD, ?

YUEH

Explanation:

CMQR, BONV, AQKZ, ZSHD, ?

The logic followed here is :

C → (-1) → B → (-1) → A → (-1) → Z → (-1) → Y

M → (+2) → O → (+2) → Q → (+2) → S → (+2) → U 

Q → (-3) → N → (-3) → K → (-3) → H → (-3) → E

R → (+4) → V → (+4) → Z → (+4) → D → (+4) → H

So, the letter-cluster that replaces the (?) to complete the series is "YUEH'