Question

if a person has type b blood, which statement describes the antibodies present in his or her blood?
only anti - a antibodies are present.
only anti - b antibodies are present.
both anti - a and anti - b antibodies are present.
neither anti - a nor anti - b antibodies are present.

Explanation:

Blood type B has B antigens on red blood cells. The immune system produces antibodies against antigens not present. Since A antigens are not present in type B blood, only anti - A antibodies are present. Anti - B antibodies would attack the body's own B antigens, so they are not present.

Answer:

Only anti - A antibodies are present.