Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
HDMS, OVVI, VNEY, CFNO, ?
Answer & explanation
Correct answer: option 2

Explanation:
HDMS, OVVI, VNEY, CFNO, ?
The logic followed here is :
H → (+7) → O → (+7) → V → (+7) → C → (+7) → J
D → (-8) → V → (-8) → N → (-8) → F → (-8) → X
M → (+9) → V → (+9) → E → (+9) → N → (+9) → W
S → (-10) → I → (-10) → Y → (-10) → O → (-10) → E
So, the letter-cluster that replaces the (?) to complete the series is "JXWE"