Question

Blood of AB group donor cannot be given to a B group patient because:

• A. The patient has anti-A antibodies
• B. The patient has anti-B antibodies
• C. The patient lacks anti-A antibodies
• D. The patient has anti-A and anti-B antibodies

Answer 1

The correct option is A

The patient has anti-A antibodies

Blood of AB group has both, A and B antigens on its RBCs. A person with blood group B has B antigens on its RBCs and produces anti-A antibodies in the plasma. These Anti A antibodies will act against the A antigens of AB blood group and cause agglutination, which can be fatal for the recipient.