This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neural pathway of Sound, Subject name: ENT
[{'content': 'Which device is shown below: \nSelect and explain. \nA. Cochlear implant, B. Auditory brainstem implant (ABI), C. Bone anchored hearing aid (BAHA), D. Hearing aid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The external components of the cochlear implant i.e. transmitter coil (rounded structure held to the skin with a small magnet), the microphone and the speech processor (worn on the ear) can be easily seen in the picture', 'role': 'assistant'}]