Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
LOCK, MMFG, NKIC, OILY, ?
1
PHPU
2
PGOU
3
PGOV
4
PHPV
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
LOCK, MMFG, NKIC, OILY, ?