A mother with B blood group has two children, one with A blood group and other with O blood group. Her husband has O blood group. The correct sentence regarding the above data is that the

• A

  husband is not the father of both the children

• B

  husband is the father of both the children

• C

  husband must be the father of child with O blood group and may be father of child with A blood group

• D

  husband could be the father of child with O blood group but not the father of child with A blood group