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: Surgery
[{'content': 'Ablett classification is used for grading \nSelect and explain. \nA. Hidradenitis suppurativa, B. Tetanus, C. Pyogenic abscess, D. Pyogenic granuloma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ablett classification grades severity of tetanus.', 'role': 'assistant'}]