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': 'Cochlear implant is done if the following is intact: \nSelect and explain. \nA. Outer hair cell, B. Inner hair cell, C. Spiral ganglion cell, D. Auditory nerve', 'role': 'user'}, {'content': 'Answer: D \nExplanation: They are indicated for patients of profound binaural SNHL (with non functional cochlear hair cells) who have intact auditory nerve functions and show little or no benefit from hearing aids.', 'role': 'assistant'}]