Question

Which of the following is/are true about ABO blood antigens?

1. They are present on the mitochondrial surface of WBCs.

2. They are found free-floating in the cytoplasm of WBCs.

3. They are present on the surface of RBCs.

4. They are present in the nucleus of RBCs.

• A. 1 and 3
• B. 2 and 4
• C. only 4
• D. only 3

Answer 1

The correct option is D

only 3

ABO blood group system is based on the antigens that are present on the surface of red blood cells. If a person has B antigen, we say that he/she has a B type blood group.