Which one of the following diseases is a sexually transmitted disease?

$A$ : Diseases or infections which are transmitted through sexual intercourse are collectively called sexually transmitted diseases $(STDs)$.
$R$ : $STDs$,if not properly treated,may lead to pelvic inflammatory diseases,abortion,stillbirth,ectopic pregnancies,infertility,or even cancer of the reproductive tract.

$STDs$ are a threat to reproductive health. Describe any two such diseases and suggest preventive measures.

Match the columns:

Column $I$	Column $II$
$(a)$ $AIDS$	$(w)$ Trichomonas vaginalis
$(b)$ Gonorrhoea	$(x)$ Treponema pallidum
$(c)$ Syphilis	$(y)$ $HIV$
$(d)$ Trichomoniasis	$(z)$ Neisseria gonorrhoeae

Which of the following cannot protect the user from contracting $AIDS$?

Which of the following is an $STD$?