Question

a person with type a blood has __________ surface antigens on his red blood cell (rbc) membranes, and __________ antibodies in his plasma.

Explanation:

Blood type is determined by the presence of antigens on red blood cells. For type A blood, A antigens are on RBCs. Antibodies in plasma are opposite to the absent antigen. Since type A lacks B antigen, anti - B antibodies are in plasma.

Answer:

C. A; anti - B