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
"Pathergy" Test is specific for - 
Select and explain. 
A. Caplan's syndrome, B. Sjogren's syndrome, C. Behcet's syndrome, D. Felty's syndrome
C: Behcet's syndrome
Answer: C: Behcet's syndrome 
Explanation: None