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
Which of the following statement is true? 
Select and explain. 
A. Paul Bunnel test is used to diagnosed measles, B. Rose Waaler test is a complement fixation test, C. Indirect hemagglutination test is less sensitive than gel diffusion test, D. Antigen antibody reaction cannot occur in the absence of electrolytes
D: Antigen antibody reaction cannot occur in the absence of electrolytes
Answer: D: Antigen antibody reaction cannot occur in the absence of electrolytes 
Explanation: Paul Bunnel test is used to diagnose infectious mononucleosis Rose Waaler test is a passive hemagglutination test Indirect hemagglutination test is more sensitive than gel diffusion test Antigen antibody reaction cannot occur in the absence of electrolytes Ref: Ananthanarayan & Panikers textbook of microbiology 9th Edition pg no.: 108,109,110,476,