Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
CEGI, EDIH, GCKG, IBMF, ?
1
KAOE
2
QXUB
3
OYSC
4
MZQD
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
CEGI, EDIH, GCKG, IBMF, ?