If a mother has blood group O and father has blood group A, the child being type AB, which of the following is wrong?

The child has I A allele and also I B allele

The mother may have IB allele that is passed to daughter

The father of the child is someone else with AB blood type

The child has IA allele and also IB allele

If a mother has blood group O and father has blood group A, the child

1.	If a mother has blood group O and father has blood group A, the child being type AB, which of the following is wrong?
A.	The mother may have I<sup>B</sup> allele that is passed to daughter
B.	The father of the child is someone else with AB blood type
C.	The child has I<sup>A</sup> allele and also I<sup>B</sup> allele
D.	This is an abnormal case
Answer» C. The child has I<sup>A</sup> allele and also I<sup>B</sup> allele