This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
[{'content': 'Best Imaging Modality for Pehes disease is? \nSelect and explain. \nA. X ray, B. USG, C. CT, D. MRI', 'role': 'user'}, {'content': 'Answer: D \nExplanation: *MRI is The IOC for AVN and Pehes Disease. Depression of right femoral head with bone marrow edema. There is joint effusion', 'role': 'assistant'}]