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

DYKM,GZIN, JAGO, MBEP, ?

PCCQ

Explanation:

DYKM,GZIN, JAGO, MBEP, ?

The logic followed here is :

D → (+3) → G → (+3) → J → (+3) → M → (+3) → P

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

K → (-2) → I → (-2) → G → (-2) → E → (-2) → C

M → (+1) → N → (+1) → O→ (+1) → P → (+1) → Q

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