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': 'Instrument used for removal of broken curette tips from the periodontal pocket is: \nSelect and explain. \nA. Schwartz periotrievers, B. Barnhart instrument, C. EVA system, D. Prophy - jet', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]