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: Surgery
[{'content': "Which one of the following is the investigation of choice for evaluation of suspected Pehes' disease? \nSelect and explain. \nA. Plain X-ray, B. Ultrasonography (US), C. Computed Tomography (CT), D. Magnetic Resonance Imaging (MRI)", 'role': 'user'}, {'content': "Answer: D \nExplanation: Bone scan and MRI are investigations to establish a diagnosis earlier. Diagnostic accuracy of 97-99% for MRI compared to 88-93% for radiography. Ref: Diagnostic Imaging of Musculoskeletal Diseases: A Systematic Approach By Akbar Bonakdarpour, William R. Reinus, Jasvir S. Khurana, 2009, Page 112; Tachdjian's Paediatric Ohopaedics, 3rd Edition, Page 680; Campbell's Operative Ohopaedics, 10th Edition, Page 1155", 'role': 'assistant'}]