Blood group $B$ will have which of the following genotypes?

$A$ man with blood group $A$ marries a woman having blood group $B$. The maximum possible blood groups among their progenies are

$A$ man with blood group $A$ marries a woman with blood group $B$. What are all the possible blood groups of their offspring?

What is the possible blood group of children whose parents are heterozygous for $A$ and $B$ blood groups?

Inheritance of $ABO$ blood group system is an example of

If a man with blood group $A$ marries a woman with blood group $AB$,which of the following offspring would indicate that the man is heterozygous for blood group $A$?