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': 'After curettage, restoration of junctional epithelium occurs after: \nSelect and explain. \nA. 3 days, B. 5 days, C. 7 days, D. 21 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Resorption Re-epithelization of sulcus : After 2-7 days.\nRestoration of junctional epithelium : After 5 days.\nImmature collagen fibers after 21 days.', 'role': 'assistant'}]