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': 'All are components of epitympanum except - \nSelect and explain. \nA. Body of incus, B. Head of malleus, C. Chorda tympani, D. Footplate of stapes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]