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
Best medium to transport/store an avulsed tooth, which is not to be reimplanted immediately? (OR) the medium which maintains the vitality of PDl and thus indicated for long duration transport of an avulse tooth 
Select and explain. 
A. Viaspan, B. Hanks balanced salt solution, C. Coconut water, D. Milk
A: Viaspan
Answer: A: Viaspan 
Explanation: None