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 best fluoride compound recommended for mouth rinsing is: 
Select and explain. 
A. Stannous fluoride, B. Acidulated phosphate fluoride, C. Neutral sodium fluoride, D. Ammonium fluoride
C: Neutral sodium fluoride
Answer: C: Neutral sodium fluoride 
Explanation: None