Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group?
(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

Logic: Letter Positions decrease by -3 each time.​

Option A: URO

U−3 → R, R −3 → O

Option B: KIE

K -2 → I, I -4  →E ( Irregular)

Option C: TQN

T −3 → Q, Q −3 → N

Option D: WTQ

W−3 → T, T −3 → Q 

So, the odd one out is: KIE​

Thus, the correct option is: (b).