Question

Which is the antigen present in the 'O' blood group?

• A. A antigen
• B. O antigen
• C. B antigen
• D. No antigens

Answer 1

The correct option is D

No antigens

The presence of a certain type of antigen on the red blood cells (RBCs) describes the type of blood group. O blood group is the only blood group does not have any type of antigen on their RBCs unless it's O +ve which means it contains D/Rh factor. There is no antigen known as O but the blood has A, B and D/Rh factor as antigens.