Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
LGG, PJL, KMO, OPT, LSG, ?
1
PVL
2
OVK
3
NUL
4
PUK
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
LGG, PJL, KMO, OPT, LSG, ?