This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
[{'content': 'Stress fractures are diagnosed by: \nSelect and explain. \nA. X-ray, B. CT, C. MRI, D. Bone scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (c)Investigation of choice for unilateral stress fracture is MRI and for bilateral is Bone Scan, when it is not mentioned unilateral or bilateral, MRI is preferred answer.', 'role': 'assistant'}]