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

Observe the given figure carefully and identify the site of fertilization by considering the parts labeled as $a, b, c,$ and $d$.

Consider the following:
$A.$ The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
$B.$ The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
$C.$ The first polar body is associated with the formation of the primary oocyte.
$D.$ Luteinizing Hormone $(LH)$ surge leads to disintegration of the endometrium and onset of menstrual bleeding.
Choose the correct answer from the options given below:

Differentiate between $(a)$ oestrus and menstrual cycles; $(b)$ ovipary and vivipary. Give an example for each type.

Match the following columns:

Column-$I$	Column-$II$
$(1)$ Testis	$(a)$ Provides nutrition to sperms
$(2)$ Ovary	$(b)$ Primary male sex organ
$(3)$ Theca interna	$(c)$ Synthesis of testosterone
$(4)$ Sertoli cells	$(d)$ Synthesis of estrogen
$(5)$ Leydig cells	$(e)$ Primary female sex organ

In the $Freemartin$ condition,which of the following is true?