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: Radiology
Stereotactic Radio-surgery is a form of – 
Select and explain. 
A. Radiotherapy, B. Radioiodine therapy, C. Robotic Surgery, D. Cryo Surgery
A: Radiotherapy
Answer: A: Radiotherapy 
Explanation: Despite its name, radiosurgery is a form of radiation therapy, not surgical procedure.