Question

A child has blood group 'O' and his mother has 'A' blood group. What could be the father's blood group?

• A. A
• B. A or AB or B
• C. B or O
• D. A or B or O

Answer 1

The correct option is D A or B or O

Child $\to$ i i
Mother $\to I^{A}i$
Father can be $\to I^{A}i\to A$ group
$I^{B}i\to B$ group
ii $\to$ O group