Question

Universal blood recipient is
A. Blood group O
B. Blood group A
C. Blood group AB
D. Blood group B

Answer 1

In transfusions of packed red blood cells, individuals with type O blood are often called universal donors. Type O carries both antibodies, so individuals can receive plasma from any blood group. A blood group can give blood to A and AB. B blood groups can give blood to B and AB.

Complete answer:
A blood type is also known as a blood group. A blood type is a classification of blood, based on the presence and absence of antibodies and antigens on the surface of red blood cells (RBC’s). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system. Type AB plasma carries neither anti-A nor anti-B antibodies and can be transfused to individuals of any blood group; but type AB patients can only receive type AB plasma.
ABO blood group system: the blood group system involves two antigens and two antibodies found in human blood. The antigens are present in the red blood cells and the antibodies in the serum. The two antigens are antigen A and antigen B. The two antibodies present are antibody A and antibody B. The blood of all human beings can be classified into 4 groups, those with both antigen A (group A), those with antigen B (group B), those with both antigen A and B (group AB) and those with no antigen (group O). The antibodies present together with the antigens are found as follows:

Antigen A with antibody B
Antigen B with antigen A
Antigen AB has no antibodies
Antigens nil and with antibodies A and B

Note: Blood types were first discovered by an Australian physician; Karl Landsteiner Blood types are inherited and represent contributions from both parents. The ABO system is the most important blood-group system in human-blood transfusion.