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
Which of the following is the most commonly used site for Deep Brain Stimulation to reduce frequency of Parkinsonism symptoms - 
Select and explain. 
A. Striatus, B. Globus Pallidus, C. Subthalamic Nucleus, D. Putamen
C: Subthalamic Nucleus
Answer: C: Subthalamic Nucleus 
Explanation: None