Most of the sexually transmitted diseases are completely curable if detected early and treated properly,except:

$STDs$ (Sexually Transmitted Diseases) can lead to several long-term complications. Which of the following are considered later complications of $STDs$?
$I$. Pelvic inflammatory disease
$II$. Abortion
$III$. Stillbirth
$IV$. Ectopic pregnancies
$V$. Infertility
$VI$. Cancer
Choose the correct combination:

The 'symptomless' period or latent period in case of syphilis may last for

Which of the following is not included in $STI$?

Which of the following parts cannot get affected in a female suffering from chlamydia?

Syphilis is caused by: