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': 'Arch shaped bone loss around maxillary molars occurs in: \nSelect and explain. \nA. Gingivitis, B. ANUG, C. Chronic periodontitis, D. Juvenile periodontitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]