Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
LJV, NMR, PPN, RSJ, ?
Answer & explanation
Correct answer: option 4

Explanation:
LJV, NMR, PPN, RSJ, ?
The logic followed here is :
L → (+2) → N → (+2) → P → (+2) → R → (+2) → T
J → (+3) → M → (+3) → P → (+3) → S → (+3) → V
V → (-4) → R → (-4) → N → (-4) → J → (-4) → F
So, the letter-cluster that replaces the (?) to complete the series is "TVF"