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': 'Which of the following is the most commonly used site for Deep Brain Stimulation to reduce frequency of Parkinsonism symptoms - \nSelect and explain. \nA. Striatus, B. Globus Pallidus, C. Subthalamic Nucleus, D. Putamen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]