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
[{'content': 'The accepted polymer to monomer ratio for packing of polymethyl methacrylate resin is \nSelect and explain. \nA. 3:01, B. 4:01, C. 10:01, D. 5:01', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]