Multiple choice

Clumping of RBC may occur when the 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

Option (1) is the correct answer.  Antigen-antibody reaction is a specific chemical interaction between antibodies produced by B cells of the white blood cells and antigens during immune reaction.