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: Anatomy
[{'content': 'Knee is which type of joint: \nSelect and explain. \nA. Synarthrosis, B. Symphysis, C. Amphiarthrosis, D. Diarthrosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Synarthrosis are immovable joints and include the ﬁbrous joints.\nAmphiarthrosis are slight mobile and include the cartilaginous joints.\nDiarthrosis are freely mobile joints and include the synovial joints.', 'role': 'assistant'}]