Which of the following letter-clusters will replace the question mark (?) in the given series?
GEA, IFB, LHA, QKB, XOA, ?
1
HUB
2
ITB
3
ISB
4
HTB
Which of the following letter-clusters will replace the question mark (?) in the given series?
GEA, IFB, LHA, QKB, XOA, ?