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
The direction of the bevel of the chisel during bone cutting is 
Select and explain. 
A. Away from the bone to be sacrificed, B. Towards the bone to be sacrificed, C. Independent of the bone to be sacrificed, D. Parallel to stress lines
B: Towards the bone to be sacrificed
Answer: B: Towards the bone to be sacrificed 
Explanation: None