Four letter-cluster have been given out of which three are alike in some manner, while one is different. Choose the odd one.

From the above option (B)EGIKM (C) BDFHJ (D) QSUWY

the above three followed the same pattern given below 

We know that A=1, B=2, C=3, D=4 ..... Z=26

then (B) 5 7 9 11 13 every alphabet difference 2  alphabet position increase left to Right.

(C) 2 4 6 8 10  every alphabet difference 2 alphabet position increase left to Right.

(D) 17 19 21 23 25  every alphabet difference 2 alphabet position increase left to Right.

but the option  does not follow that pattern 

(A) NOQST wrote in the form of alphabet position 14 15 17 19 20 it difference increase left to Right 1, 2, 2, 1 

therefore option (A) NOQST is different from to the another given option 

Ans = NOQST