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': 'The scalpel blade most commonly used for oral surgical procedures is: \nSelect and explain. \nA. No: 22, B. No: 12, C. No: 11, D. No: 15', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]