Question

Which blood group doesn't have antibodies in the serum?

• A. Blood group O
• B. Blood group B
• C. Blood group A
• D. Blood group AB

Answer 1

The correct option is D

Blood group AB

A person with an AB blood group has both 'A' and 'B' antigens and no antibodies against these antigens in the plasma. Finally, a person with O blood group has no antigens and both anti a and anti b antibodies in the plasma. A person with blood group A will have 'A' antigen on the RBC and anti b antibodies in the plasma. A person with blood group B will have 'B' antigen on the RBC and anti a antibodies in the plasma.