Multiple choice

Clumping of RBC may occur when blood of one person is mixed with the serum or blood of another person. This is due to

  1. antigen - antibody reaction

  2. antitoxin - antibody reaction

  3. antitoxin - antigen reaction

  4. antibody - antibody reaction

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When incompatible blood types mix, antibodies in the plasma bind to antigens on red blood cells, causing agglutination (clumping). This antigen-antibody reaction can trigger serious transfusion reactions.