What is the period between $12$ and $18$ years of age in a person called?

Which one of the following is the effect of higher $pH$ on the sperms?

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

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

Fraternal twins are produced when

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.