Question

A child has blood group B. Mother has blood group A. The blood group of the father would be

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

Answer 1

Answer: (C)

B or AB

Child has blood group B i.e. RBC has antigen B and plasma has anti a.

Mother is of blood group A so it has A antigen and plasma has anti b.

So the child has acquired antigen B from father's blood. Hence father is of blood group B or AB both of which will have antigen B.

So, the correct option is C.