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 stapedectomy surgery, prosthesis used is - \nSelect and explain. \nA. Teflon biston, B. Grommet, C. Total ossicular replacement, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]