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': 'All are radiological features of sickle cell anemia except \nSelect and explain. \nA. Veebra plana, B. Floating teeth, C. Bone infarct, D. Marrow hyperplasia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Floating teeth', 'role': 'assistant'}]