Select the term that will complete the following letter series.
QN, RP, TS, WW, _____, FH
Answer & explanation
Correct answer: option 2

Explanation:
QN, RP, TS, WW, _____, FH
The logic followed here is :
Q → (+1) → R → (+2) → T → (+3) → W → (+4) → A → (+5) → F
N → (+2) → P → (+3) → S → (+4) → W → (+5) → B → (+6) → H
So, the letter-cluster that replaces the (?) to complete the series is "AB"