Question

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

• A. patient has antibodies b
• B. patient lacks antibodies b
• C. patient lacks antibodies a
• D. patient has antibodies a

Answer 1

The correct option is A

patient has antibodies b

Blood of AB group has A and B antigens. A person with B group produces anti-A antibodies which will act against the A antigens of AB blood group and cause clumping and clotting of blood, which can be fatal for the recipient.