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 is the one that does not belong to that group?

Logic: +5 shift in both letters.

A) B→G = +5, K→P = +5
B) O→T = +5, Y→D = +5 (cyclic)
C) F→K = +5, S→Y = +6
D) M→R = +5, P→U = +5

Only option C does not follow +5 shift in both letters.

Final Answer:
FS – KY

Final Correct Option:
(C)