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': 'To ensure high quality direct gold restorations, which of the following conditions should be satisfied? \nSelect and explain. \nA. The appropriate gold form is used for each specific clinical situation, B. The material is used only where it is indicated, C. A perfectly dry and clean field is provided, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: High-quality direct-gold restorations can be ensured only when four principal conditions are satisfied:\xa0\n\nThe appropriate gold form is used for each specific clinical situation.\nThe material is used only where it is indicated.\nA perfectly dry and clean field is provided.\nThe material is properly\xa0manipulated\xa0with\xa0the\xa0correct\xa0instruments. Obviously, these conditions can\xa0be\xa0satisfied only if the clinician has acquired the necessary knowledge, skills\xa0and experience.\n\nRef:Phillip’s Science of Dental Materials ed 12 pg 414', 'role': 'assistant'}]