Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
CWHK, FULL, ISPM, LQTN, ?
1
OYOO
2
OOYO
3
OOXO
4
OOWO
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
CWHK, FULL, ISPM, LQTN, ?