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
Ideally Dentist population ration should be 
Select and explain. 
A. 5.597222222, B. 1:10000, C. 1:20000, D. 1:40000
C: 1:20000
Answer: C: 1:20000 
Explanation: None