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
'Pelkan spur' is a radiological feature of which of the following? 
Select and explain. 
A. Rickets, B. Scurvy, C. Hemophilia, D. All
B: Scurvy
Answer: B: Scurvy 
Explanation: The radiological features of scurvy 1) Spurs (Pelkan Spur) = Metaphyseal spurs projecting at right angles to axis of shaft 2) Subperiosteal hemorrhages = Diaphyseal Subperiostealhematoma with calcification of elevated periosteum is the sure sign of healing (woody-leg) 3) Coical thinning ('pencil-thin" coex) 4) Corner sign of Parke = Subepiphyseal infarction or comminution causing mushrooming or cupping of epiphysis 5) Osteoporosis = characteristically "ground-glass' osteoporosis 6) Rarefaction zone of Trummerfield = Metaphyseal radiolucent zone on shaft side 7) White line of Frankel Metaphyseal zone of provisionallpreparatory calcification also seen in lead or phosphorus or bismuth poisoning and in healing rickets 8) Wimberger's sign Sclerotic ring seen around the low density osteopenic epiphysis