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: Dental
[{'content': 'Al are exploring instruments except: \nSelect and explain. \nA. DG-16, B. JK-17, C. CK-17, D. JW-17', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]