What should be the blood types of parents in the children having only A and B types of blood?

What should be the blood types of parents in the children having only A and B types of blood?

Q. What should be the blood types of parents in the children having only A and B types of blood?

A.            A and O

B.            AB and A

C.            (c).AB and O

D.            A and B

Answer: AB and O

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