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    If X is the sister of Y, Z is the father of A and Y is the son of A, then how is Z related to X?
    Question

    If X is the sister of Y, Z is the father of A and Y is the son of A, then how is Z related to X?

    A.

    Great grandfather

    B.

    Granddaughter

    C.

    Father

    D.

    Grandfather

    Correct option is D

    Given: 
    If X is the sister of Y,
    Z is the father of A and Y is the son of A, 
    From the given information family diagram will be
    Z is Grandfather of X.​​
    (Gender of A is not decided so we get the answer by option)
    Thus, correct option is (d).

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