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: Surgery
"Rugger Jersey Spine" is seen in: 
Select and explain. 
A. Fluorosis, B. Archondoplasia, C. Renal osteodystrophy, D. Marfan s syndrome
C: Renal osteodystrophy
Answer: C: Renal osteodystrophy 
Explanation: Renal osteodystrophy may produce a 'rugger jersy' (striped) appearance in lateral X-rays of the spine, due to alternating bonds of increased and decreased bone density. Ref: Apley's System of Ohopedics and Fractures, 8th Edition, Page 124; Harrison's Principles of Internal Medicine, 16th Edition, Pages 1225-29.