Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?
(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

Correct option is A

Logic: 1st letter − 1 = 3rd letter and 2nd letter + 7 = 4th letter

Option (A): NI – MO → Does not follow the pattern.
N − 1 = M 
I + 7 = P (not O) 
Option (B): TO – SV → Follows the pattern.
T − 1 = S 
O + 7 = V 
Option (C): KF – JM → Follows the pattern.
K − 1 = J 
F + 7 = M 
Option (D): QL – PS → Follows the pattern.
Q − 1 = P 
L + 7 = S 
Thus, the correct option is (A) NI – MO .