Which one of the following sexually transmitted infections is completely curable? 

Except hepatitis-B, genital herpes, and HIV infections, other diseases are completely curable if detected early and treated properly. For herpes and HIV, the most effective medications available are antiviral drugs that can modulate the course of the disease, but they cannot cure the disease. For hepatitis B, antiviral medications can help to fight the virus and slow damage to the liver. Chlamydia, gonorrhea,  syphilis, and trichomoniasis are generally curable with existing, effective single-dose regimens of antibiotics.