Which disease is caused by the bacterium $Treponema$ $pallidum$?

Which organization in India provides awareness about $AIDS$ and information related to reproductive health?

List four points of significance of reproductive health in a society. Name any two areas related to reproductive health which have improved over the past $50$ years in our country.

What is the function of Copper-$T$ used by some women? What is its side effect?

What are the different methods of contraception?

Describe sexually transmitted diseases (STDs) and mention the ways to prevent them.