A person with unknown blood group under ABO system, has suffered much loss in an accident and needs immediate blood trasfusion. His one friend who has a valid certifacte of his own blood type. What would have been the type of blood group of the donor friend

Options

A. Type A
B. Type B
C. Type AB
D. Type O

Answer

D

Explanation

Because blood group O is universal donor as they donot have any antigen over its surface thus no antibodies get formed against it.