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

GOAL, IMCJ, KKEH, MIGF, ?

OGID

Explanation:

GOAL, IMCJ, KKEH, MIGF, ?

The logic followed here is :

G → (+2) → I → (+2) → K → (+2) → M → (+2) → O  

O → (-2) → M → (-2) → K → (-2) → I → (-2) → G  

A → (+2) → C → (+2) → E → (+2) → G → (+2) → I  

L → (-2) → J → (-2) → H → (-2) → F → (-2) → D  

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