Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
PSU, GBL, ?, OTT, FCK
1
ATC
2
UBH
3
XKC
4
ZKG
Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
PSU, GBL, ?, OTT, FCK