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': 'Score 4 of IOTN? \nSelect and explain. \nA. No treatment, B. Minor anomaly, no treatment, C. Borderline treatment, D. Treatment need', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]