Agglutination refers to
- A. the bursting of white blood cells
- B. the formation of lymph
- C. a rise in platelet count
- D. the clumping of red blood cells when antibodies bind their antigens
Explanation
Cross linking by antibodies ties red cells into visible clumps, the reaction used to type blood groups. Clotted clumps can block vessels, which is why agglutination makes mismatched transfusion lethal.