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': 'Frequent dislocation of TMJ is due to \nSelect and explain. \nA. Spasm of muscles of mastication, B. The articular eminence being smaller, C. Decreased free way space, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]