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': 'Planned radiation volume is: \nSelect and explain. \nA. Depends on 90% of tumour size, B. Less than targeted radiation volume, C. More than targeted radiation volume, D. Equal to targeted radiation volume', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. More than targeted radiation volume', 'role': 'assistant'}]