What can be said about a person who has the “A” antigen on their red blood cells? A. their blood contains anti-B agglutinins B. their blood contains anti-A agglutinins C. their blood contains anti-A and anti-B agglutinins D. their blood contains neither anti-A nor anti-B agglutinins
Option A. Their blood includes anti-B agglutinins. If you've got the A antigen to your rbc, you can't have the anti-A agglutinin on your plasma otherwise you would agglutinate your own blood.
