with A antigen on the
red cells and anti-B antibodies in the plasma.
Type B with B antigen on the red cells and anti-A antibodies in
the plasma.
Type AB with both A and B antigens on the red cells and neither
anti-A nor anti-B in the plasma.
Type O with no A or B antigens on the red cells and both anti-A
and anti-B antibodies in the plasma.
If you are a Type A person, you do not carry antibodies against A
markers. But you do have antibodies against Type B blood.
If you are a Type B person, you have antibodies against Type A cells.
If you are a Type O, you have antibodies against both Type A and B!