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': 'Test tube retepegs are seen in the microscopic section of \nSelect and explain. \nA. ANUG, B. Inflammatory gingival hyperplasia, C. Gingival enlargement due to dilantin sodium, D. Plasma cell gingivitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]