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': 'Not a radiological feature of sickle cell anemia \nSelect and explain. \nA. Hair on end appearance, B. Bone within bone appearance, C. Diaphyseal or epiphyseal infarct, D. Chondrocalcinosis.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chondrocalcinosis is a feature of Pseudogout.', 'role': 'assistant'}]