Which of the following can be complications resulting from $STDs$ without timely detection and treatment?
$A.$ Pelvic inflammatory disease $(PID)$
$B.$ Stillbirths
$C.$ Infertility or even cancer of the reproductive tract
$D.$ Ectopic pregnancies

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 pathogen causes genital warts,a type of $STD$ in humans?

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

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 one of the following statements is correct regarding sexually transmitted diseases $(STDs)$?