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': 'which of the following is used to remove broken instruments in root canal: \nSelect and explain. \nA. Masserman kit, B. Peizoelectric kit, C. Magnetorestrictive kit, D. Rhodes kit', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Masserman kit or endoextractor kit is used for removal of broken instruments in root canals (MAN -98, KAR -03)', 'role': 'assistant'}]