This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy, Subject name: Radiology
[{'content': 'Stereotactic radiosurgery is a form of \nSelect and explain. \nA. Radiotherapy, B. Cryosurgery, C. Neurosurgery intervention, D. Embolisation and radiofrequency ablation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Stereotactic radiosurgery means delivery of precise high dose radiation in a single fraction to intracranial targetsReference: Eric J Hall Textbook of Radiobiology for Radiologist; 5th edition', 'role': 'assistant'}]