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

RAB, SZD, TYF, UXH, ?

VWJ

Explanation:

RAB, SZD, TYF, UXH, ?

The logic followed here is :

R → (+1) → S → (+1) → T → (+1) → U → (+1) → V 

A → (-1) → Z → (-1) → Y → (-1) → X → (-1) → W 

B → (+2) → D → (+2) → F → (+2) → H → (+2) → J 

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