Correct option is B
Given:-
BCE, EGJ, HKO, LOT, NSY

Solution:-
BCE
B → 2nd letter of the alphabet
C → 3rd letter of the alphabet
E → 5th letter of the alphabet
Difference:-
C - B = 1
E - C = 2 the differences are 1, 2.
EGJ
E → 5th letter of the alphabet
G → 7th letter of the alphabet
J → 10th letter of the alphabet
Difference:-
G - E = 2
J - G = 3
So, the differences are 2, 3
LOT
L → 12th letter of the alphabet
O → 15th letter of the alphabet
T → 20th letter of the alphabet
Difference:-
O - L = 3
T - O = 5
So, the differences are 3, 5.
Here it is clearly shown that LOT is the odd one out.
Thus, the correct answer is option (b) LOT