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': 'Name the instrument shown in the colour plate, which is often used in osseous surgery: \nSelect and explain. \nA. Back action chisel, B. Ochsenbein chisel, C. Interproximal files, D. Sugarman chisel', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]