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
A 12-years-old child suffers from an avulsed tooth following trauma. The best medium which to carry in the tooth to the dental clinic is: 
Select and explain. 
A. Buccal vestibule, B. Milk, C. Water, D. Cotton
B: Milk
Answer: B: Milk 
Explanation: None