Which letter-cluster will replace the question mark (?) to complete the given series?
GTCL, KWEM, OZGN, SCIO, ?
1
VGLQ
2
WKFD
3
VJEF
4
WFKP
Which letter-cluster will replace the question mark (?) to complete the given series?
GTCL, KWEM, OZGN, SCIO, ?