The sex of a fetus can be determined by examining the cells of the amniotic fluid for the presence of:

Assertion: Females have less stature than males after puberty.
Reason: This happens because of the presence of $hCG$ in the blood of females.

Match the hormones given in List-$1$ with their functions given in List-$2$.

List-$1$	List-$2$
$(a)$ Oxytocin	$(p)$ Stimulates ovulation
$(b)$ Prolactin	$(q)$ Maintenance of implantation and pregnancy
$(c)$ Luteinizing hormone	$(r)$ Milk secretion after childbirth
$(d)$ Progesterone	$(s)$ Uterine contraction during parturition
	$(t)$ Reabsorption of water by nephrons

Oestrus cycle is seen in

An egg with yolk in the center and cytoplasm surrounding it is known as:

Consider the following four statements $(A-D)$ and select the option which includes all the correct ones only.
$(A)$ The male sex accessory ducts include rete testis,vasa efferentia,epididymis and vas deferens.
$(B)$ Leydig cells synthesise and secrete testicular hormones called androgens.
$(C)$ The female reproductive system is located in the pelvic region.
$(D)$ Each testis has about $250$ compartments called testicular lobules.