Three of the following four letter clusters are alike in a certain way and one is different. Pick the cluster that is different from the rest.

JP

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

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H → OPPOSITE → S

C → OPPOSITE → X

M → OPPOSITE → N

J → (+6) → P (THIS IS ODD)

EXCEPT OPTION 4 ALL ARE FOLLOWING A PARTICULAR PATTERN