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': 'ANUG affects the \nSelect and explain. \nA. Attached gingiva, B. Marginal gingiva, C. Alveolar mucosa, D. Inter dental papilla', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]