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': 'Citron bodies are seen in \nSelect and explain. \nA. Clostridium perfringens, B. Clostridium difficile, C. Clostridium septicum, D. Clostridium tertium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Citron bodies - Boat or leaf shaped bodies seen in clostridium septicum.', 'role': 'assistant'}]