Question

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

• A. A, B
• B. A, B, AB, O
• C. AB only
• D. A, B, AB

Answer 1

Answer: (B)

A, B, AB, O

Answer 2

A woman with blood group $A$ can have either of the genotypes $-I^{A} I^O$ or $I^{A} I^{A} . A$ man with a blood group $B$ can have either of the genotypes -$I^BI^O$ or $I^BI^B$. Since the given question doesn't mention the specific genotype, thus any of the above-mentioned genotypes can be crossed. As a result of which there is a maximum possibility of obtaining all the blood groups ($A, B, A B, O$ ) among their progeny.