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': 'Example for ellipsoid joint is - \nSelect and explain. \nA. Wrist, B. Knee, C. Ankle, D. Shoulder', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Wrist', 'role': 'assistant'}]