Question

If someone is blood type O, then their blood contains antibodies for which antigens?

A. A
B. Neither A nor B
C. B
D. Both A and B

Answer 1

Group O has another A not B antigens on red cells(but both A and B antibody are in the plasma)

Answer 2

Blood type O person will have no antigens on the surface of RBC, but they do contain anti-A and anti-B antibodies in their plasma.

Step-by-step explanation:

Since there are no antigens on the surface of RBC, they become universal donors. Blood grouping is generally based on two things one is the presence of antigens on the surface of RBC and the other thing is presence of antibodies in plasma. Blood type A person will have A antigens on the surface of RBC and anti-B antibodies in their plasma. That is why they cannot accept blood from blood type B. Vice versa is the case of blood type B. In case of people with blood type AB, they contain both the antigens A and B on RBC surface but do not contain any antibodies. That is why they are called universal acceptors.