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': 'Hardness of which of the following abrasives is maximum? \nSelect and explain. \nA. Sand, B. Emery, C. Boron carbide, D. Silicon carbide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Diamond called as super abrasive>boron carbide> silicon carbides', 'role': 'assistant'}]