To solve this problem, we need to understand why a person with blood group AB is considered a universal recipient. Let's analyze the options:$\newline \bullet$Option 1: Both A and B antigens on RBC but no antibodies in the plasma.$\newline$ - Individuals with blood group AB have both A and B antigens on the surface of their red blood cells (RBCs).$\newline$ - They do not have anti-A or anti-B antibodies in their plasma, which allows them to receive blood from any group without risk of agglutination.$\newline$ - This option correctly describes why AB individuals are universal recipients.$\newline \bullet$Option 2: Both A and B antibodies in the plasma.$\newline$ - This is incorrect because individuals with blood group AB do not have antibodies against A or B antigens.$\newline \bullet$Option 3: No antigen on RBC and no antibody in the plasma.$\newline$ - This describes blood group O, not AB. Individuals with blood group O have no A or B antigens but have both anti-A and anti-B antibodies.$\newline \bullet$Option 4: Both A and B antigens in the plasma but no antibodies.$\newline$ - This is incorrect because antigens are present on the RBCs, not in the plasma.$\newline$Therefore, the correct option is Option 1: Both A and B antigens on RBC but no antibodies in the plasma.