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

DVG, ITM, NRS, SPY, ?

XNE

Explanation:

DVG, ITM, NRS, SPY, ?

The logic followed here is :

D → (+5) → I → (+5) → N → (+5) → S → (+5) → X

V → (-2) → T → (-2) → R → (-2) → P → (-2) → N 

G → (+6) → M → (+6) → S → (+6) → Y → (+6) → E

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