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 grafts has the best prognosis? (OR) Which of the following graft has high success rate? 
Select and explain. 
A. Xenograft, B. Autograft, C. Allograft, D. Homograft
B: Autograft
Answer: B: Autograft 
Explanation: None