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': 'All are non-sporing anaerobes of medical impoance except \nSelect and explain. \nA. Actinomyces, B. Bacteroides, C. Clostridia, D. Fusobacterium', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Clostridia", 'role': 'assistant'}]