Select the letter-cluster that can replace the question mark (?) in the given letter-cluster series.
THC, DIU, VJE, FKW, XLG,?
Answer & explanation
Correct answer: option 3

Explanation:
DIU, VJE, FKW, XLG,?
The logic followed here is :
D → (-8) → V → (+10) → F → (-8) → X → (+10) → H
I → (+1) → J → (+1) → K → (+1) → L → (+1) → M
U → (+10) → E → (+18) → W → (+10) → G → (+18) → Y
So, the letter-cluster that replaces the (?) to complete the series is "HMY"