Question

which antibodies can be found in a person with blood group o?
a) antibody for antigen ab
b) neither antibody for antigen a and b
c) antibody for antigen o
d) antibodies for both antigen a and b

Explanation:

Blood group O has no A or B antigens on red blood cells. To avoid immune reactions, the plasma naturally contains antibodies against the antigens that are absent from the person's own red blood cells. So, people with blood group O have both anti-A and anti-B antibodies.

Answer:

d) Antibodies for both antigen A and B