This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Non motile clostridia is - \nSelect and explain. \nA. Cl. perfringens, B. Cl. novyi, C. Cl. botulism, D. Cl. difficle', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Clostridium perfringens", 'role': 'assistant'}]