Select the letter - cluster from among the given options that can replace the question mark (?) in the following series.
KRBP, IPHV, GNNB, ?, CJZN
1
ELTH
2
PDLR
3
ETLH
4
PRSB
Select the letter - cluster from among the given options that can replace the question mark (?) in the following series.
KRBP, IPHV, GNNB, ?, CJZN