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': 'Theory of TMJ ankylosis is/are: \nSelect and explain. \nA. Condylar burst theory., B. Synovial fluid leaks and attracts calcium ion., C. Both., D. No such theories are there for TMJ ankylosis.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]