Which letter cluster will replace the question mark (?) to complete the given series?
GYCQ, ICZR, ?, MKTT, OOQU
1
QDRS
2
KRRS
3
RRKS
4
KGWS
Which letter cluster will replace the question mark (?) to complete the given series?
GYCQ, ICZR, ?, MKTT, OOQU