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': 'About Tetanus, true are all, except: \nSelect and explain. \nA. Caused by exotoxin, B. Variable incubation period, C. Active immunisation is best for prophylaxis, D. Caused by endotox', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Caused by endotox', 'role': 'assistant'}]