Question

What blood type is a person if their plasma contains ONLY anti-A agglutinin?

a.A
b.B
c.O
d.AB
e.Not enough information is provided to answer question.

Answer 1

The person with plasma containing only anti-A agglutinin must have blood type B, as type O would contain both anti-A and anti-B antibodies.

Step-by-step explanation:

If a person's plasma contains only anti-A agglutinin, it means that they do not have A antigens on their red blood cells (RBCs). This indicates that the person has either type B or type O blood, because type B blood has B antigens and anti-A antibodies, and type O blood has neither A nor B antigens, but both anti-A and anti-B antibodies. Since the question specifies that the plasma contains only anti-A agglutinin, the individual cannot have type O blood, as type O would also have anti-B agglutinin in the plasma. Therefore, the correct answer is that the person's blood type is B.