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 cast gold alloys is used for fabricating partial denture frameworks \nSelect and explain. \nA. Type I - Soft, B. Type II - Hard, C. Type III - Hard, D. Type IV - Extra Hard', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]