Question

If blood group of mother is 'AB' and father is 'O', the child may be

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

Answer 1

The correct option is D A or B

Mother's blood group is AB, so antigens would be iA and iB.

Father blood group is O, so antigens would be iO and iO only.
Now child's blood group could be iA x iO = iAiO, which means A blood group or iB x iO = iBiO, which means B blood group.

Hence, correct answer is option D.