Four children belonging to the same parents have the following blood groups A, B, AB and O. Hence, the genotypes of the two parents are ______.

Both parents are homozygous for ‘B’ group

Both parents are homozygous for ‘A’ group

One parent is homozygous for ‘A’ and another parent is homozygous for ‘B’

One parent is heterozygous for ‘A’ and another parent is heterozygous for ‘B’

Four children belonging to the same parents have the following blood g

1.	Four children belonging to the same parents have the following blood groups A, B, AB and O. Hence, the genotypes of the two parents are ______.
A.	Both parents are homozygous for ‘A’ group
B.	One parent is homozygous for ‘A’ and another parent is homozygous for ‘B’
C.	One parent is heterozygous for ‘A’ and another parent is heterozygous for ‘B’
D.	Both parents are homozygous for ‘B’ group
Answer» D. Both parents are homozygous for ‘B’ group