Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

JKZ

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

THE LOGIC FOLLOWED HERE IS;

1) UVD,

U → (+1) → V

V → OPPOSITE -1 → D

2) PQI,

P → (+1) → Q

Q → OPPOSITE -1 → I

3) JKZ,

J → (+1) → K

K → OPPOSITE +10 → Z

4) EFT,

E → (+1) → F

F → OPPOSITE -1 → T

Thus, JKZ does not belong to that group.