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': 'Diamond abrasive having particle size of 125-150 µm is classified? \nSelect and explain. \nA. Fine, B. Coarse, C. Medium, D. Extrafine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Diamond particle size is commonly categorized as coarse (125–150 µm), medium (88–125 µm), fine (60–74 µm)\xa0and very fine (38–44 µm) for diamond preparation instruments.\nSturdevants operative dentistry 4th edition page 338', 'role': 'assistant'}]