Discussion
Which of the following blood group is considered as Universal Donor ?
Answer: D
The universal donor is blood group O.
Group O red cells carry neither the A nor the B antigen, so they are not attacked by the anti-A or anti-B antibodies of any recipient. Strictly, O negative is the universal donor for red cells, because it also lacks the Rh antigen.
Group AB is the universal recipient, since its plasma has no anti-A or anti-B antibodies. Groups A and B can be given only to compatible recipients.
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