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: Dental
[{'content': 'In TMJ 2 joint works synchronously hence known as: \nSelect and explain. \nA. Ginglinoid joint., B. Biarthrodial joint., C. Compound joint., D. Synovial joint.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]