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    Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which lett
    Question

    Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair 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.)

    A.

    PN-QO

    B.

    QO-RP

    C.

    LJ-MK

    D.

    US-UV

    Correct option is D

    Logic: 1st letter + 1 = 3rd letter and 2nd letter + 1 = 4th letter
    Now, we check each options.
    ​Option (a): ​PN-QO (Follow)
    P + 1 = Q, N + 1 = O
    ​Option (b): QO-RP (Follow)
    Q + 1 = R, O + 1 = P
    ​Option (c): LJ-MK (Follow)
    L + 1 = M, J + 1 = K 
    ​Option (d): ​US-UV​ (Not Follow)
    U + 1 \neq​ U, S + 1 \neq​ V
    Thus, correct option is (d).

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