This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiology Q Bank, Subject name: Radiology
[{'content': '16 yr old, obese female presented with history of bilateral hip pain from a long duration. Endocrinology tests show hypothyroidism. She has a painful limping gait. Which of the following investigation is of no use in diagnosis of this condition? \nSelect and explain. \nA. X-Ray, B. MRI, C. CT, D. USG', 'role': 'user'}, {'content': "Answer: D \nExplanation: History given is suggestive of SCFE( Slipped capital femoral epiphysis). X-Ray showsa Trethowan's sign CT is used for Acute/Chronic slip MRI is IOC. USG has no role in diagnosing this condition.", 'role': 'assistant'}]