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 :: ?
# : USN :: PNI : %
1
# = LKP, % = MKJ
2
# = WUP, % = NLG
3
# = MKI, % = NMJ
4
# = MUP, % = NKJ