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: 1st letter + 5 = 2nd letter and 2nd letter + 5 =  3rd letter

Now, we check each options.

Option (a): XCH (Follow)

X + 5 = C, C + 5 = H

Option (b): FKP (Follow)​

F + 5 = K, K + 5 = P

Option (c): QVA (Follow)​

Q + 5 = V, V + 5 = A

Option (d): MPW (Not Follow)​

M + 5 $$\neq$$ P, P + 5 $$\neq$$ W​

Thus, correct option is (d).