This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Investigation of choice in stress fracture NOT RELATED- OHO \nSelect and explain. \nA. MRI, B. CT, C. Bone scan, D. X ray', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Now conventional wisdom and also all the elderly examiners will spontaneously opt for Bone scan as the answer. However, a careful review of literature preferentially indicates MRI to be a much better modality - highly sensitive as well as specific - for diagnosis of stress fractures. Go with MRI.', 'role': 'assistant'}]