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': 'What treatment should not be required for the patient with grade II furcation involvement? \nSelect and explain. \nA. Furcation plasty, B. Tunnel preparation, C. GTR, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]