Question

    Four letter-clusters have been given out of which three

    are alike in some manner and one is different. Select the one that is different.
    A ZXD Correct Answer Incorrect Answer
    B IGK Correct Answer Incorrect Answer
    C TRX Correct Answer Incorrect Answer
    D DBH Correct Answer Incorrect Answer

    Solution

    The second letter is the second preceding letter of the first letter and the third letter is the sixth succeeding letter of the second letter as per the English Alphabetical series. ZXD → Z - 2 = X, X + 6 = D IGK → I - 2 = G, G + 6 = M ≠ K TRX → T - 2 = R, R + 6 = X DBH → D - 2 = B, B + 6 = H 

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