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
[{'content': 'All are toxin-antitoxin neutralization tests except: \nSelect and explain. \nA. Schick test, B. Eleks gel precipitation test, C. Neil Mooser reaction, D. Naeglers test', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Eleks gel precipitation testNeil Mooser reaction is done in guinea pigs for Rickettsia rickettsiae (Scrotal necrosis) and tunica reaction (Rickettsia conorii, Rickettsia akari and Rickettsia typhi)', 'role': 'assistant'}]