Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
MN, NM, OL, PK, ?
Answer & explanation
Correct answer: option 2
Explanation:
MN, NM, OL, PK, ?
The logic followed here is :
M → (+1) → N → (+1) → O → (+1) → P → (+1) → Q
N → (-1) → M → (-1) → L → (-1) → K → (-1) → J
So, the letter-cluster that replaces the (?) to complete the series is "QJ"