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    The given series is a letter cluster series with one term missing. Choose the correct option in place of the question mark and complete the series.
    Question

    The given series is a letter cluster series with one term missing. Choose the correct option in place of the question mark and complete the series.
    CBDA, GFHE, KJLI, ONPM, SRTQ,?

    A.

    WVXU

    B.

    YVXW

    C.

    XUWV

    D.

    XWYV

    Correct option is A

    Given Series:

    CBDA, GFHE, KJLI, ONPM, SRTQ, ?

    Step-by-Step Logic

    Observe the shift between clusters:

    CBDA → GFHE

    C → G (+4)
    B → F (+4)
    D → H (+4)
    A → E (+4)

    Every letter increases by +4.

    Check next transitions:

    GFHE → KJLI
    KJLI → ONPM
    ONPM → SRTQ

    All follow the +4 alphabetical shift for each position.

    Now apply +4 to SRTQ:

    S → W
    R → V
    T → X
    Q → U

    Correct Answer: WVXU

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