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: Surgery
[{'content': 'Which of the following technique is used to treat fibrous ankylosis: \nSelect and explain. \nA. Condylectomy., B. Gap arthroplasty., C. Interpositional gap arthroplasty., D. Any of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]