Which of the following $STDs$ is caused by the human papilloma virus $(HPV)$ and is transmitted through intimate contact with an infected person?

Syphilis is an infectious bacterial disease caused by $Treponema\ pallidum$ with $3$ stages:
$(A)$ Infectious painless ulcers on the genitals $\quad(i)$ First
$(B)$ Blindness, heart trouble, aortic impairment $\quad(ii)$ Second
$(C)$ Skin lesions, hair loss, swollen joints $\quad(iii)$ Third
Which of the following is the correct match between the symptoms and stage?

Which of the following $STDs$ is not caused by a bacterium?

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

Which of the following sexually transmitted diseases is caused by a protozoan?

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