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': 'Gold standard of prosthetic replacement is: \nSelect and explain. \nA. Duplicate in the replacement to natural, B. Comfortable & stable in function, C. Socially acceptable in aesthetics, D. These should be maintained throughout their serviceable lifetime at a reasonable cost', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tooth replacement prosthesis properties:\n\nDuplicate in the replacement to natural (Gold standard)\nAppearance (socailly acceptable)\nFunction (comfortable & stable)\nMaintenance (throughout their serviceable lifetime on reasonable cost)', 'role': 'assistant'}]