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: Medicine
[{'content': '"Pathergy" Test is specific for - \nSelect and explain. \nA. Caplan\'s syndrome, B. Sjogren\'s syndrome, C. Behcet\'s syndrome, D. Felty\'s syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]