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
Least desirable material for storing the tooth is: 
Select and explain. 
A. Saliva, B. Water, C. Milk, D. HBSS
B: Water
Answer: B: Water 
Explanation: Least desirable medium for storing tooth is WATER (hypotonic).