Question

AB bloodgroup is caleed universal acceptor, but if a person with A bloodgroup will donate his blood, it will have antibody B, which can react with antigen B, still why AB bloodgroup is known as universal acceptor?

Answer 1

A => antigen A : anti B
B => antigen B : anti A
O => no antigen : anti A & B
AB => A & B antigen : no anti
Therefore the proteins on others (i.e.anti A&B) can easily attach with the antigens on AB without reacting.