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': 'Parameningeal Rhabdomyosarcoma is best diagnosed by – \nSelect and explain. \nA. MRI, B. CT Scan, C. SPECT, D. PET', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]