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: Medicine
[{'content': "What diagnosis is suggested by the findings on this anteroposterior radiograph of the right tibia? \nSelect and explain. \nA. Ewing's sarcoma, B. Marrow hyperplasia, C. Osteomalacia, D. Polyostotic fibrous dysplasia", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer B. Marrow hyperplasiaThe radiograph of the right tibia and fibula show the characteristic coarsened trabecular pattern, cortical thinning, and a widened medullary cavity consistent with marrow hyperplasia. This patient was being treated for beta-thalassemia major.', 'role': 'assistant'}]