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
Name the instrument shown in the colour plate, which is often used in osseous surgery: 
Select and explain. 
A. Back action chisel, B. Ochsenbein chisel, C. Interproximal files, D. Sugarman chisel
B: Ochsenbein chisel
Answer: B: Ochsenbein chisel 
Explanation: None