In humans,how many genotypes and phenotypes are produced by the three different alleles of the $ABO$ blood group system?

As per the $ABO$ blood grouping system,the blood group of the father is $B^{+}$,the mother is $A^{+}$,and the child is $O^{+}$. Their respective genotypes can be:
Choose the most appropriate answer from the options given below:
$A. I^Bi / I^Ai / ii$
$B. I^BI^B / I^AI^A / ii$
$C. I^AI^B / iI^A / I^Bi$
$D. I^Ai / I^Bi / I^Ai$
$E. iI^B / iI^A / I^AI^B$

Mother is homozygous for blood group $B$,and father has blood group $A$ (genotype unknown). Therefore,the possible blood groups in the progeny are:

Self-sterility in $Nicotiana$ was reported by:

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

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