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: Radiology
[{'content': '"Rugger-jersey spine" in X-rays is a feature of: \nSelect and explain. \nA. Hypoparathyroidism, B. Pseudo hypoparathyroidism, C. Pseudo hypoparathyroidism, D. Renal osteodystrophy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Renal osteodystrophy"Rugger-jersey" spine (resembling the stripes on rugby jerseys) means horizontal sclerosis subjacent to vertebral endplates with intervening normal osseous density its causes include hyperparathyroidism (as seen in crf), myelofibrosis.', 'role': 'assistant'}]