Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
PC, NA, LY, JW, ?
Answer & explanation
Correct answer: option 4

Explanation:
PC, NA, LY, JW, ?
The logic followed here is :
P→ (-2) → N → (-2) → L → (-2) → J → (-2) → H
C → (-2) → A → (-2) → Y → (-2) → W → (-2) → U
So, the letter-cluster that replaces the (?) to complete the series is "HU"