Which of the following letter-clusters will replace the question mark (?) in the given series ?
RLV, PNS, NPP, ? , JTJ
Answer & explanation
Correct answer: option 2

Explanation:
RLV, PNS, NPP, ? , JTJ
The logic followed here is :
R → (-2) → P → (-2) → N → (-2) → L → (-2) → J
L → (+2) → N → (+2) → P → (+2) → R → (+2) → T
V → (-3) → S → (-3) → P → (-3) → M → (-3) → J
So, the letter-cluster that replaces the (?) to complete the series is "LRM"