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: Radiology
[{'content': 'All of the following are radiological features of scleroderrna except: \nSelect and explain. \nA. Diffuse periosteal reaction, B. Oesophageal dysmotility, C. Erosion of the tip of the phalanges, D. Lung nodules', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Diffuse periosteal reaction', 'role': 'assistant'}]