Question

A woman sues a man for the support of her child. She has type $A$ blood and her child type $O$. The man's blood cannot be

• A. $A$
• B. $B$
• C. $O$
• D. $AB$

Answer 1

Answer: (D)

$AB$

If both mother and alleged father have blood type A, then the child can only have A or O blood. For instance,If the Mother's blood type is B, and the father's blood type is O, then their child must be either B or O.On the other hand, if the mother's blood type is A, and the fathers is B, the child could be any of the four blood types A, B, AB or O.But If mother blood type is A and her child Blood type is O.The father's blood cannot be AB because child can have A, B or AB groups but not O.

So, the correct answer is 'AB'.