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
Metallic taste is due to SnF in saliva is 
Select and explain. 
A. Stannous triphosphate, B. Stannic triphosphate, C. Tin hydroxyl phosphate, D. Stannous hydroxide
C: Tin hydroxyl phosphate
Answer: C: Tin hydroxyl phosphate 
Explanation: None