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: ENT
[{'content': 'To distinguish between cochlear and post cochlear damage test done is - \nSelect and explain. \nA. Brainstem evoked response, B. Impedance audiometry, C. Pure tone audiometry, D. Auditory cochlear potential', 'role': 'user'}, {'content': 'Answer: A \nExplanation: BERA is very useful in distinguishing between cochlear pathology and retrocochlear pathology for SNHL\nImpedence audiometry and PTA tests the middle ear pathology.', 'role': 'assistant'}]