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: Radiology
[{'content': "In bone infarcts, all are true except: \nSelect and explain. \nA. Dysbaric osteonecrosis are commonly juxta aicular, B. Occur in Gaucher's disease, C. Occur in thalassaemia major, D. Are often diaphyseal in sickle cell disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Occur in thalassaemia major', 'role': 'assistant'}]