Question

In ABO blood groups, how many phenotypes are found?

• A. 6
• B. 8
• C. 1
• D. 4

Answer 1

Answer: (D)

4

There are four main blood groups A, B, AB and O. ABO blood group system is the classification of human blood based on the inherited properties of red blood cells due to the presence or absence of the antigens A and B, which are carried on the surface of the red cells. Thus the correct answer is option D.