Which of the following sexually transmitted infections is not considered completely curable?

Chlamydia,trichomoniasis and syphilis are . . . . . . diseases.

Select the correct option for the early symptoms of Sexually Transmitted Diseases (STDs).
$I -$ Itching in the genital area
$II -$ Abortion
$III -$ Fluid discharge in the genital area
$IV -$ Pelvic Inflammatory Diseases $(PID)$
$V -$ Slight pain in the genital area
$VI -$ Swelling in the genital area

$STDs$ caused by viruses are:
$I. \;AIDS$
$II. \;Hepatitis-B$
$III. \;Genital herpes$

Which of the following diseases is not sexually transmitted?

What are $STIs$? Give information about diseases caused by them.