This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, 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: High-frequency stimulation of the subthalamic nucleus is a neurosurgical procedure for the alletion of motor symptoms of Parkinson's disease and debilitating medication-induced dyskinesias Ref Harrison20th edition pg 2456