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': 'After condensation of direct filling gold, its hardness value may be equivalent to \nSelect and explain. \nA. Type I gold alloy, B. Type II gold alloy, C. Type III gold alloy, D. Type IV gold alloy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pure gold has hardness value of 22 VHN.\nThe process of gold compacting is also known as condensation. After work hardening, its hardness (52 to 75 VHN) is equivalent to and may exceed that of type I gold alloy (50 VHN), and approaches that of type II gold alloy (90 VHN). This category of gold is also known as cohesive gold and direct filling gold for restorations.\nRef: Phillips 12th edition. page 415', 'role': 'assistant'}]