Select the letter-cluster that can replace the question mark (?) in the following series.
DYKM,GZIN, JAGO, MBEP, ?
Answer & explanation
Correct answer: option 3

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"