Question

Universal donors have no antigens present on the surface of RBC and have both a and b antibodies. They belong to which blood group?

• A. A
• B. B
• C. AB
• D. O

Answer 1

The correct option is D O

• O blood group is the universal donor.
• It has no antigen such as A, and B present on the surface of RBC to react with the recipient's blood.
• Therefore, it is compatible with any blood type.
• Similarly, Type AB blood is called the universal recipient type because a person who has it can receive blood of any type.

Hence option D is correct.