The eggs in which the fate of every part of the egg becomes fixed are called:

Match the column-$I$ with column-$II$.

Column-$I$	Column-$II$
$(A)$ Leydig cells	$(i)$ Provides nutrition to developing sperm
$(B)$ Sertoli cells	$(ii)$ Secrete mainly progesterone
$(C)$ Corpus luteum	$(iii)$ Secrete inhibin
$(D)$ Developing follicle	$(iv)$ Secrete androgen

$A$: Most birds possess only the left ovary and left oviduct for conveying the ovum released from the ovary.
$R$: The avian ovary does not form a corpus luteum from the ruptured ovarian follicle which undergoes rapid shrinkage.

$A$: Inhibin is secreted by the corpus luteum.
$R$: They inhibit the $FSH$ and $GnRH$ production.

Fraternal twins are produced when

Match the hormones listed in List-$I$ with their functions indicated in List-$II$:

List-$I$	List-$II$
$(a)$ $FSH$	$(i)$ Prepares endometrium for implantation
$(b)$ $LH$	$(ii)$ Develops female secondary sexual characters
$(c)$ Progesterone	$(iii)$ Induces uterine wall contraction
$(d)$ Estrogen	$(iv)$ Development of corpus luteum
	$(v)$ Maturation of Graafian follicle