This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic disorders, Subject name: Pediatrics
Definitive sign of scurvy in X-ray ? 
Select and explain. 
A. Ringed epiphysis, B. Ground glass appearance, C. White line in metaphysis, D. Thin coex
C: White line in metaphysis
Answer: C: White line in metaphysis 
Explanation: Definitive sign of scurvy in X-rays of long bones is the white line of Frenkel,an irregular thickened line at the metaphyses representing calcified cailage at the zone ofcalcification.Other characteristic findings are ground glass appearance with thinning of coex and a zone of rarefaction under the white line of metaphysis,as a linear break in the bone running proximally and parallel to the white line.There may be spurs at the level of the white line. There may also be white rings surrounding the epiphyseal centres of ossification. Reference :Essential pediatrics-Ghai,8th edition,page no:120,121.