Three of the following four are alike in a certain way and thus form a group. Which is the one that 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 C

Logic: 1st letter +9 = 2nd letter and 2nd letter +7 = 3rd letter
Explanation:
Option (a) AJQ → A (1) +9 = J (10) +7 = Q (17)
Option (b) MVC → M (13) +9 = V (22) + 7 = 29 – 26 = C (3)
Option (c) OXC → O (15) + 9 = X (24) + 7 = 31 – 26 = E (5) ≠ C
Option (d) ENU → E (5) + 9 = N (14) + 7 = U (21).