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
Which of the following pockets offers best chance for bone regeneration: 
Select and explain. 
A. Suprabony pocket, B. One - wall infrabony pocket, C. Two - wall infrabony pocket, D. Three - wall infrabony pocket
D: Three - wall infrabony pocket
Answer: D: Three - wall infrabony pocket 
Explanation: None