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': 'A dimensionally accurate reproduction of a part of the oral cavity or extraoral facial structures that is produced in a durable hard material? \nSelect and explain. \nA. Model, B. Die, C. Cast, D. impression', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cast-Positive dimensionally accurate replica of a part of oral cavity or extraoral facial structures in a durable hard dental material\nModel-Positive replica of teeth, soft tissues, and related structures can be used for the construction of orthodontic and prosthetic appliances and mostly used as a diagnostic aid/display purpose/patient education\nDie-Positive dimensionally accurate replica of prepared tooth', 'role': 'assistant'}]