This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'An electrode of a cochlear implant is placed in \nSelect and explain. \nA. Horizontal semicircular canal, B. Scala media, C. Scala tympani, D. Scala vestibule', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pas of the implant: External pa- Microphone, Speech processor, and Transmitter coilInternal pa- Receiver stimulator, Electrode arrayThe electrode array is inseed into the scala tympani by widening the round window (Cochleostomy)Ref: Hazarika; 3rd ed; Pg: 87', 'role': 'assistant'}]