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
[{'content': 'Remote after loading technique useful for \nSelect and explain. \nA. Teletherapy, B. Brachytherapy, C. Stercotactic radiotherapy, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Teletherapy', 'role': 'assistant'}]