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
D1 bone found mainly in which site? 
Select and explain. 
A. Anterior maxilla, B. Anterior mandible, C. Posterior mandible, D. Posterior maxilla
B: Anterior mandible
Answer: B: Anterior mandible 
Explanation: None