Q. A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
A) Type A
B) Type B
C) Type AB
D) Type O
Explanation
[Solution from source] Blood group O red cells carry neither the A nor the B antigen, so they are not agglutinated by the recipient's antibodies: O is the universal donor. Since the patient's group is unknown, only O blood can safely be given without delay; AB is the universal recipient, not donor. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.