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': 'Localized diffuse gingivitis extends from \nSelect and explain. \nA. the interdental papillae to attached gingiva in a limited area, B. the margin to attached gingiva in a limited area, C. the interdental papillae to mucobuccal fold in a limited area, D. the margin to the mucobuccal fold in a limited area', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]