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
The rubber dam is approximately placed in 
Select and explain. 
A. 3-5 min, B. 5-7 min, C. 10 min, D. 10-12 min
A: 3-5 min
Answer: A: 3-5 min 
Explanation: None