Concept:The universal acceptor blood group is AB because it has both A and B antigens on red blood cells and no antibodies in plasma, so it can receive blood from all other groups (A, B, AB, O) without causing an immune reaction.
Explanation:Blood grouping is based on the presence or absence of antigens (A and B) on red blood cells and antibodies in plasma.
Group A: A antigen, anti-B antibody → can receive from A and O.
Group B: B antigen, anti-A antibody → can receive from B and O.
Group AB: Both A and B antigens, no antibodies → can receive from A, B, AB, and O, making it the universal acceptor.
Group O: No antigens, both anti-A and anti-B antibodies → can only receive from O, but it is the universal donor.
The following table summarises antigen-antibody patterns and donor compatibility:
Since AB blood has no antibodies, it can accept any blood type (A, B, AB, O) without agglutination. Additionally, if Rh factor is present (AB+), it is the universal acceptor for both ABO and Rh systems.
Answer:AB (Option C).