A 28-year-old man presents with genital ulcers and painful inguinal lymphadenopathy (buboes). He recently returned from a trip to Africa. The ulcers are soft and painful. What is the most likely diagnosis and treatment?
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A
Syphilis; benzathine penicillin G IM
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B
Chancroid; azithromycin 1g single dose
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C
Genital herpes; acyclovir 400mg TID
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D
LGV; doxycycline 100mg BID x 21 days