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 male-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: Recent onset of severe hip pain with a history of long-term steroid therapy suggests the diagnosis of AVN hip. MRI is the investigation of choice for AVN hip.', 'role': 'assistant'}]