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
Which of the following cast gold alloys is used for fabricating partial denture frameworks 
Select and explain. 
A. Type I - Soft, B. Type II - Hard, C. Type III - Hard, D. Type IV - Extra Hard
D: Type IV - Extra Hard
Answer: D: Type IV - Extra Hard 
Explanation: None