Select the letter-cluster that can replace the question mark (?) in the following series.
TULG, WRPC, ZOTY, CLXU,?1
GIAQ
2
FIDR
3
FJCQ
4
FIBQ
Select the letter-cluster that can replace the question mark (?) in the following series.
TULG, WRPC, ZOTY, CLXU,?