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
[{'content': 'Least desirable material for storing the tooth is: \nSelect and explain. \nA. Saliva, B. Water, C. Milk, D. HBSS', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Least\xa0desirable medium for storing tooth is WATER (hypotonic).', 'role': 'assistant'}]