If the blood group of a father and a mother are A and O respectively

If the blood group of a father and a mother are A and O respectively then which one of the following blood group is not possible in their children?
(a) B
(b) AB
(c) O
(d) B, AB or O

Anurag Mishra Professor Asked on 29th February 2016 in Biology.
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    Answer (d) By trachea system

    Anurag Mishra Professor Answered on 2nd March 2016.
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