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 materials can be routinely used to sharpen carbide instruments? \nSelect and explain. \nA. Arkansas stone, B. Silicon carbide, C. Aluminium oxide, D. Diamond', 'role': 'user'}, {'content': "Answer: D \nExplanation: Diamond is the hardest available abrasive and is the most effective for cutting and shaping hard materials.\nIt is the only material routinely capable of sharpening carbide as well as steel instruments.\n\nRef: Sturdevant's art and science of operative dentistry. 4th edition page 317", 'role': 'assistant'}]