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
Cutting cone is 
Select and explain. 
A. Leading edge of osteoblasts, B. Leading edge of osteoclasts, C. Trailing edge of osteoblast, D. Trailing edge of osteoclasts
B: Leading edge of osteoclasts
Answer: B: Leading edge of osteoclasts 
Explanation: None