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': 'In Cochlear implants, the electrodes are most commonly placed at: \nSelect and explain. \nA. Oval window, B. Round window, C. Horizontal semicircular canal, D. Cochlea', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The cochlear implant electrodes are placed in the scala tympani of the cochlea. The electrode thus stimulates the cochlear nerve which is a pa of the vestibulo-cochlear nerve (CN VIII).', 'role': 'assistant'}]