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
"Rugger-jersey spine" in X-rays is a feature of: 
Select and explain. 
A. Hypoparathyroidism, B. Pseudo hypoparathyroidism, C. Pseudo hypoparathyroidism, D. Renal osteodystrophy
D: Renal osteodystrophy
Answer: D: Renal osteodystrophy 
Explanation: 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.