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

The sexually transmitted disease that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is

Which of the following is not a sexually transmitted disease?

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

What complications can arise if sexually transmitted diseases (STDs) are not diagnosed and treated in time?
$I -$ Pelvic Inflammatory Disease $(PID)$,$II -$ Abortions,$III -$ Stillbirths
$IV -$ Ectopic pregnancies,$V -$ Infertility,$VI -$ Cancer of the reproductive tract

All reproductive tract infections $(RTIs)$ are $STDs$,but all $STDs$ are not $RTIs$. Justify with an example.