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: Medicine
[{'content': 'Chorea occurs due to lesion in - \nSelect and explain. \nA. Cerebellum, B. Motor cortex, C. Caudate Nucleus, D. Subthalamas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]