This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clostridium, Subject name: Microbiology
[{'content': "Naegler's reaction is given by - \nSelect and explain. \nA. Clostridium bifermentans, B. Cl perfringens, C. Cl sordelli, D. All of the above", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is i.e., All of the above " Besides Cl perfringens, other bacteria that give a positive Nagler reaction are Cl bifermentans, Cl sordelli and Cl barati', 'role': 'assistant'}]