This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brainstem, cerebellum and ventricles, Subject name: Anatomy
[{'content': 'Which is NOT a pa of basal ganglia \nSelect and explain. \nA. Caudate nucleus, B. Thalamus, C. Lenticular nucleus, D. Globus pallidus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Basal ganglia: Structural components: Functional components Putamen Globus pallidus Amygdaloid nucleus Caudate nucleus subthalamic nucleus substantia nigra So thalamus being pa of diencephalon is not a structural pa of basal ganglia.', 'role': 'assistant'}]