Three of the four groups of number-letters are alike. Which does not belong to the group?

​Logic: The number equals the difference between the alphabetical positions of the two letters.

Explanation (option-wise):
A) T7M
T = 20, M = 13
20 − 13 = 7 → follows the rule
B) B10R
B = 2, R = 18
18 − 2 = 16 ≠ 10 → does not follow the rule
C) U13H
U = 21, H = 8
21 − 8 = 13 → follows the rule
D) J16Z
J = 10, Z = 26
26 − 10 = 16 → follows the rule
Thus, the group that does not belong is option (B).