The period between $12$ and $18$ years of age in a person is known as adolescence.

$I -$ Sperm,$II -$ Testosterone,$III -$ Relaxin,$IV -$ Ovum,$V -$ Estrogen,$VI -$ Progesterone.
Produced by human males $- P$
Produced by human females $- Q$
$P$ $Q$

Match the columns.

Column $I$	Column $II$
$(a)$ Testis and ovary	$(1)$ Part of reproductive organ that transports germ cells
$(b)$ Clitoris	$(2)$ Developing fleshy fold surrounding both sides of the urogenital groove
$(c)$ Oviduct	$(3)$ Gametes which produce germ cells
$(d)$ Scrotum,labium majora	$(4)$ Organs associated with sexual response

The prepubertal period refers to a stage of

Fraternal twins are produced when

$A$: $LH$ acts on Sertoli cells for release of certain factors required for spermatogenesis.
$R$: Spermiation occurs directly under the influence of $LH$.