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
Most frequent cause of recurrent genital ulcers in a sexually active male is: 
Select and explain. 
A. Syphilis, B. Chancroid, C. TB, D. Herpes
D: Herpes
Answer: D: Herpes 
Explanation: 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.