Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

LGG, PJL, KMO, OPT, LSG, ?

PVL

Explanation:

LGG, PJL, KMO, OPT, LSG, ?

The logic followed here is :

L → (+4) → P → (+4) → K → (+4) → O → (+4) → L→ (+4) → P

G → (+3) → J → (+3) → M → (+3) → P → (+3) → S → (+3) → V

G → (+5) → L → (+5) → O → (+5) → T → (+5) → G → (+5) → L

So, the letter-cluster that replaces the (?) to complete the series is "PVL"