This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitic Disorders in Children, Subject name: Pediatrics
[{'content': "Silk Road disease is: \nSelect and explain. \nA. Behcet's syndrome, B. Giant cell aeritis, C. Henoch-Schonlein purpura, D. Wegener's granulomatosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Behcet disease: high prevalence in countries along the Silk Road, extending from Japan to the eastern Mediterranean characterized by recurrent oral ulcerations, uveitis & skin abnormalities', 'role': 'assistant'}]