Blood Group Compatible Donor A. Blood Group A 1. A and O B. Blood Group B 2. B and O C. Blood Group AB 3. O only D. Blood Group O 4. A, B, AB, and O

Step-by-step solution

Blood Group A can receive blood from A and O blood types because it has A antigens and can tolerate O, which has no antigens. Blood Group B can receive blood from B and O blood types due to its B antigens and tolerance of O. Blood Group AB is the universal recipient, meaning it can receive blood from A, B, AB, and O types, as it has both A and B antigens. Blood Group O is the universal donor but can only receive blood from O type due to the lack of A and B antigens.