Which among the following STDs are not completely curable?

The correct answer is Option (1) → HIV infection, genital herpes, hepatitis-B.

Sexually transmitted diseases (STDs), also called STIs, spread through sexual contact. Most of them can be cured completely if detected early and treated properly. Three are exceptions: hepatitis-B, genital herpes and HIV infection.

Option (1) HIV infection, genital herpes, hepatitis-B. — Correct. All three are the book’s exceptions. HIV infection and hepatitis-B are caused by viruses that stay in the body, and genital herpes also keeps coming back. None of them is completely curable.

Option (2) Trichomoniasis, genital warts, gonorrhoea. — Incorrect. Trichomoniasis, genital warts and gonorrhoea are completely curable when detected early and treated properly.

Option (3) Trichomoniasis, syphilis, chlamydiasis. — Incorrect. Trichomoniasis, syphilis and chlamydiasis are all curable with early, proper treatment.

Option (4) Syphilis, genital herpes, chlamydiasis. — Incorrect. Genital herpes is not completely curable, but syphilis and chlamydiasis are curable. So the set as a whole is wrong.

NCERT Extract:
Sexually Transmitted Infections (STIs) – “… Some of these infections like hepatitis–B and HIV can also be transmitted by sharing of injection needles, surgical instruments, etc., with infected persons, transfusion of blood, or from an infected mother to the foetus too. Except for hepatitis-B, genital herpes and HIV infections, other diseases are completely curable if detected early and treated properly.”