Question

    A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is

    A O positive Correct Answer Incorrect Answer
    B A positive Correct Answer Incorrect Answer
    C B positive Correct Answer Incorrect Answer
    D Cannot be determined on the basis of the given data Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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