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: Dental
[{'content': 'The most frequent cause of recurrent genital ulceration in a sexually active male is – \nSelect and explain. \nA. Herpes genitalis, B. Aphthous ulcer, C. Syphilis, D. Chancroid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause of recurrent genital ulcer is HSV-2. Infact, the characteristic feature of Herpes genitalis is that it is recurrent.', 'role': 'assistant'}]