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

PZX, QAY, SCA, VFD, ?

ZJH

Explanation:

PZX, QAY, SCA, VFD, ?

The logic followed here is :

P → (+1) → Q → (+2) → S → (+3) → V → (+4) → Z

Z → (+1) → A → (+2) → C → (+3) → F → (+4) → J 

X → (+1) → Y → (+2) → A → (+3) → D → (+4) → H

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