Select the letter-cluster that can replace the question mark (?) in the following series.
IHUW : HFRS :: LMQT : ?
1
KKNP
2
LKPN
3
LMNO
4
LNMK
Select the letter-cluster that can replace the question mark (?) in the following series.
IHUW : HFRS :: LMQT : ?