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': 'In heat cure denture base acrylic resins the\nmonomer is: \nSelect and explain. \nA. Methacrylate, B. Ethylmethacrylate, C. Methyl ethyl methacrylate, D. Polymethylmethacrylate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]