Select the option that can replace the question mark (?) in the following series.
NB, OA, PZ, QY, ?
Answer & explanation
Correct answer: option 1
Explanation:
NB, OA, PZ, QY, ?
The logic followed here is :
N → (+1) → Q → (+1) → P → (+1) → Q → (+1) → R
B → (-1) → A → (-1) → Z → (-1) → Y → (-1) → X
So, the letter-cluster that replaces the (?) to complete the series is "PX"