A woman with blood group B has a child with blood group A. After birth, the child was diagnosed with hemolytic disease of the newborn resulting from…

A woman with blood group B has a child with blood group

A. After birth, the child was diagnosed with hemolytic disease of the newborn resulting from rhesus incompatibility. What blood group is the child’s father likely to have, and what must be the mother’s Rh blood factor?