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': 'The reshaping process of gingiva in the absence of \nperiodontal pocket is \nSelect and explain. \nA. curettage, B. gingivoplasty, C. gingivectomy, D. flap operation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]