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': 'Most frequent cause of recurrent genital ulcers in a sexually active male is: \nSelect and explain. \nA. Syphilis, B. Chancroid, C. TB, D. Herpes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Herpes typically causes recurrent genital ulcers, as the virus remains in dormant stage in the nerve ganglia after first episode which causes relapse after becoming active.', 'role': 'assistant'}]