This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hearing Loss, Subject name: ENT
[{'content': 'All are subjective tests for audiometry except: \nSelect and explain. \nA. Tone decay, B. Impedance audiometry, C. Speech audiometry, D. Pure tone audiometry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Impedance audiometry(Ref. Scott Brown, 6th ed., Vol 2; 2/12/1)Impedance audiometry is an objective test. It does not require the cooperation of patient.Other objective audiometry tests are; OAEs, Electrocochleography and BERA', 'role': 'assistant'}]