Transfusing type A blood into a person with type B blood is dangerous because
- A. the donor cells are larger than the recipient's
- B. the recipient's anti A antibodies agglutinate the donor red cells
- C. both blood types destroy the plasma
- D. the mixture becomes hypertonic
Explanation
Type B plasma contains anti A antibodies that clump and lyse A cells, blocking capillaries. Matching blood groups before transfusion prevents this antigen antibody reaction.