A certain road accident partient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor ?

Options

A. Blood group B
B. Blood group AB
C. Blood group O
D. Blood group A

Answer

C

Explanation

Persons with blood group 'O' (with no antigens on RBCs) are known as universal donors as they can donate blood to any person of any blood group of ABO system. Thus the blood group of the donor must be 'O' which can be safely donated to the patient as the patient's body will not produce any antibody against the person's blood.