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
The graft with the maximum osteogenic potential is: 
Select and explain. 
A. Allogaft, B. xenograft, C. Autocortical, D. autocancellus
D: autocancellus
Answer: D: autocancellus 
Explanation: None