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': 'Movement of stapes causes vibration in - \nSelect and explain. \nA. Scala media, B. Scala tympani, C. Scala vestibuli, D. Semicircular canal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]