Question

.Which blood group is universal donor?

A. O+

B. O–

C. AB–

D. AB+

​

Answer 1

Ans. B

Sol. It’s the blood group named O- which

is known as universal donor. It is so

because it has neither A nor B as surface

antigens on the red blood cells, also the

fact such blood group also lack D protein,

as a result there is likely immune

response against it, making it a universal

donor.