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': 'lntraosseous skeletal tumour is best diagnosed by : \nSelect and explain. \nA. Plain X-ray, B. NMR, C. CT scan, D. CT with scintiscan', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. NMR', 'role': 'assistant'}]