This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
[{'content': 'Best investigation for detection of stress fracture is? \nSelect and explain. \nA. X-ray, B. CT scan, C. Bone scan, D. MRI', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans DBoth MRI and Bone scan can identify stress fracture but MRI has better image resolution and can also rule out many similar disorders and hence is considered better.', 'role': 'assistant'}]