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 otosclerosis during stapes surgery prosthesis used is: \nSelect and explain. \nA. Teflon piston, B. Grommet, C. Total ossiculear replacement, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Teflon piston The currently used prosthesis in otosclerosis surgery are: Teflon (M/C used) Stainless steel Platinum -- All are MRI compatible Gold Titanium The prosthesis is placed between the long process of incus and foot plate of stapes', 'role': 'assistant'}]