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': 'Temporomandibular joint is a: \nSelect and explain. \nA. Diarthroidal and ginglymoidal joint, B. Ball and socket joint, C. Hinge joint, D. Fibrous joint', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]