Question

In human blood group AB,

• A. Antibodies are present
• B. Antibodies are absent
• C. Antibody 'a' is present
• D. Antibody 'b' is present

Answer 1

Answer: (B)

Antibodies are absent

The ABO blood group system is based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells. Antigens are present on the RBC and antibodies in the serum. A person is having blood group AB denotes he is having antigen A and Antigen B on the RBC and no antibodies in the serum. Since an AB patient doesn't have any antibodies in the serum, it can receive any type of blood, and hence is a universal recipient.

So, the correct answer is 'Antibodies are absent',