Out of the given letter clusters, three are similar in a certain manner. However, one letter cluster is NOT like the other three. Select the letter cluster which is different from the rest.

MP

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

**********************************************************

C → opposite → X

A → opposite → Z

F → opposite → U

M → opposite → N ≠ P (ODD)