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    Question

    Select the letter that can replace the question mark in

    the following series. PQO, QRP, RSQ, ?
    A STR Correct Answer Incorrect Answer
    B RTS Correct Answer Incorrect Answer
    C TRS Correct Answer Incorrect Answer
    D TSR Correct Answer Incorrect Answer

    Solution

    P + 1 = Q, Q + 1 = R, R + 1 = S Q + 1 = R, R + 1 = S, S + 1 = T O + 1 = P, P + 1 = Q, Q + 1 = R

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