Concept:The ABO blood group system classifies blood based on antigens (A and B) on red blood cells and antibodies in plasma. A person with blood group AB has both A and B antigens and no antibodies, making them able to receive blood from any donor.
Explanation:- Blood group A has antigen A and anti-B antibodies. It can receive from A and O.
- Blood group B has antigen B and anti-A antibodies. It can receive from B and O.
- Blood group AB has both A and B antigens and no antibodies. It can receive from A, B, AB, and O.
- Blood group O has no antigens but both anti-A and anti-B antibodies. It can only receive from O.
Thus, AB is the universal acceptor because its plasma lacks antibodies that would attack donor red blood cells.
Answer:C. AB