Answer:
People with type A blood have the antigen A on the surface of their RBCs, while people with type B blood have the B antigen. Individuals with type AB blood have both A and B antigens, whereas people with type O blood have no antigens present (there is no antigen O).
Step-by-step explanation:
Type O
Type A
Type B
Type AB
RBC Antigen present
None
A
B
A, B
Plasma antibody present
Anti-A, Anti-B
Anti-B
Anti-A
None
Compatible donor RBC
O
O, A
O, B
O, A, B, AB
Incompatible donor RBC
A, B, AB
B, AB
A, AB
None