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
Which of the following is false about Behcet's Syndrome 
Select and explain. 
A. HLA-B51 association, B. Superificial or deep peripheral vein thrombosis, C. Pathergy test positive, D. Recurrent genital ulcer is a hallmark diagnostic Criteria
D: Recurrent genital ulcer is a hallmark diagnostic Criteria
Answer: D: Recurrent genital ulcer is a hallmark diagnostic Criteria 
Explanation: Recurrent oral ulcer is a hallmark Criteria.