What will be genotype of parents of a child with 'O' blood group

What will be the parents' blood groups if the blood group of a child is AB ?

select the set of parents that cannot produce child with blood group 'O'

select the set of parents that cannot produce child with blood group 'O'

What will be the genotypes of parents if they produce offspring with all the four blood groups A, B, AB and O ?

A mother with blood group B type has a child with blood group type O .What is the possibilty of the genotypes of that mother and father ?

A woman with blood group 'O' has a child with blood group 'O' .If she calims a friends of hers with blood group 'A' as father of the genotype of the father should be :

The probality of a having a child with blood group O to parents with blood groups A and B is

A women with blood group 'O' has a child with blood group 'O'. Father with blood group 'A' must have the genotype