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': 'Wilsons disease primarily affects which part of CNS \nSelect and explain. \nA. Basal ganglia, B. Cerebrum, C. Cerebellum, D. Pons', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Particularly affects the basal ganglia, particularly the putamen.', 'role': 'assistant'}]