This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
[{'content': 'Pelkan spur is seen in - \nSelect and explain. \nA. Rickets, B. Scurvy, C. Hemophilia, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Radiological features of scurvy: Palkan spur : metaphyseal spurs projecting at right angles to the shaft. White line of Frankel : calcified cailage in the metaphysis Trumefeld zone : zone of rarefraction below the white line of Frankel Wimburger sign : ring surrounding the ephiphyseal centres of ossification Pencil thin coex Subperiosteal hemorrhages Generalised osteoporosis', 'role': 'assistant'}]