Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of ::?
# : KNF :: QCV : %
1
# = IPD, % = OET
2
# = HPD, % = NFS
3
# = MLH, % = OET
4
# = HQC, % = NFS