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': 'A 40-year-old female patient on long term steroid therapy presents with recent onset of severe pain in the right hip. Imaging modality of choice for this problem is: \nSelect and explain. \nA. CT scan, B. Bone scan, C. MRI, D. Plain X-ray', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. MRI', 'role': 'assistant'}]