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': 'Which of the following can be used as die material? \nSelect and explain. \nA. Gypsum, B. Epoxy resin, C. Electroplated silver, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The most commonly used die materials are type IV (dental stone, high-strength) and type V (dental stone, high-strength, high-expansion) improved stones.\xa0\nNon-gypsum die materials are also available, such as acrylic, polyester, and epoxy resins. These materials are limited in their compatibility with impression materials.\nMetal dies produced from electroplated impression material have moderately high strength, adequate hardness, and excellent abrasion resistance.\n\nPhillip’s 12th edition page 211, 212', 'role': 'assistant'}]