If a child has blood group 'A' and his mother has blood group 'A', what are the possiblities of blood group of his father

For a child having blood group B, if father has blood group A,, what may be the blood group of the mother

There is a boy with blood group B whose mother has blood group A. Give the possible genotypes and phenotypes of his father.

A child has blood group 'O'. If the father has the blood group 'A' and the mother has the blood group 'B' . What will be the genotypes of the parents ?

A man has blood group O and his mother blood group A. The genotype of mother should be

A man has blood group O and his mother blood group A. The genotype of mother should be

A man has blood group O and his mother blood group A. The genotype of mother should be

There is a boy with blood group ‘B’, his mother has blood group O. Write possible genotypes and phenotypes of his father.