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 advantages of overdenture are all of the following, except 
Select and explain. 
A. Preservation of alveolar bone, B. Aesthetics, C. Retention, D. Support
B: Aesthetics
Answer: B: Aesthetics 
Explanation: None