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    Question

    If Pi is the brother of Qi, Bi is the brother of Qi and

    Pi is the brother of Ei, then which of the following statements is definitely true?
    A Qi is the brother of Bi Correct Answer Incorrect Answer
    B Qi is the brother of Ei Correct Answer Incorrect Answer
    C Ei is the brother of Bi Correct Answer Incorrect Answer
    D Bi is the brother of Ei Correct Answer Incorrect Answer

    Solution

    While the question clearly states that Pi, Qi, Bi, and Ei are siblings, we do not know the sex of E and Q. Thus, B is the brother of E is the only statements that holds true.   Hence, correct answer is (D).

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