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 accepted polymer to monomer ratio for packing of polymethyl methacrylate resin is 
Select and explain. 
A. 3:01, B. 4:01, C. 10:01, D. 5:01
A: 3:01
Answer: A: 3:01 
Explanation: None