A 29-year-old man presents with a painless genital ulcer and generalised non-tender lymphadenopathy. Syphilis serology is positive (RPR high titre, treponemal test positive). What is the recommended treatment for early syphilis?AOral doxycycline 100 mg twice daily for 3 daysBBenzathine benzylpenicillin 1.8 g (2.4 million units) intramuscularly single doseCIntravenous benzylpenicillin for 14 daysDNo treatment is required as lesions will regressETopical aciclovir creamCheck my answer