Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
BZCA, EXFY, HVIW, KTLU, ?
1
ORNP
2
NRPS
3
NROS
4
RNPO
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
BZCA, EXFY, HVIW, KTLU, ?