This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
Rugger jersy sign Is seen in - 
Select and explain. 
A. Ankylosing spondylitis, B. TB spine, C. Osteoahritis, D. Myeloma
D: Myeloma
Answer: D: Myeloma 
Explanation: The rugger jersey spine sign is said to be almost diagnostic of the osteosclerosis associated with secondary hyperparathyroidism of chronic renal failure. The major skeletal components of renal osteodystrophy that can be seen on radiographs include osteomalacia, osteosclerosis, and soft-tissue calcification . Some radiological charesteristics of veebrae Ref image - Radiologyassistant.com