Question

What cannot be the blood groups of the parents of a baby having blood group A?

• A. O and O
• B. O and A
• C. A and O
• D. A and A.

Answer 1

The correct option is A O and O

Baby is of blood group A and that indicates blood has antigen A and anti b.

So mother and father should have blood groups with antigen A and anti b i.e. blood groups of either A and B or AB.

So, the correct option is A.