This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Paul bunnel reaction is a type of - 
Select and explain. 
A. Agglutination, B. CFT, C. Precipitation, D. Flocculation test
A: Agglutination
Answer: A: Agglutination 
Explanation: Paul - Bunnell test for diagnosis of infectious mononucleosis are heterophile agglutination test. When a paiculate antigen is mixed with its antibody in the presence of electrolytes at a suitable temperature and pH, the paicles are clumped or agglutinated. Reference : Anathanarayan & paniker's 9th edition, pg no:108, 109 <\p>