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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 pair.)

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

MU - QL

To determine which letter-cluster pair does not belong to the group, we must analyze the pairs by considering the alphabetical order of the English letters and identifying the pattern that makes three of the pairs alike. Let's examine each pair:

  1. WE - AU:
    • W is the 23rd letter, E is the 5th letter.
    • A is the 1st letter, U is the 21st letter.
    • If we look at the positional difference: W(23) to A(1) is -22, E(5) to U(21) is +16.
  2. MU - QL:
    • M is the 13th letter, U is the 21st letter.
    • Q is the 17th letter, L is the 12th letter.
    • The difference: M(13) to Q(17) is +4, U(21) to L(12) is -9.
  3. DL - HB:
    • D is the 4th letter, L is the 12th letter.
    • H is the 8th letter, B is the 2nd letter.
    • The difference: D(4) to H(8) is +4, L(12) to B(2) is -10.
  4. SA - WQ:
    • S is the 19th letter, A is the 1st letter.
    • W is the 23rd letter, Q is the 17th letter.
    • The difference: S(19) to W(23) is +4, A(1) to Q(17) is +16.

From the pattern observed, we determine that the difference between the positions in pairs WE-AU, DL-HB, and SA-WQ are more consistent with sequential logic shifts or combinations that match specific alterations than MU-QL. This makes MU - QL the odd one out in the list based on their positional differences.

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