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(A) During the menstrual cycle,the levels of pituitary hormones ($LH$ and $FSH$) and ovarian hormones (estrogen and progesterone) fluctuate in a speci

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(A) During the menstrual cycle,the levels of pituitary hormones ($LH$ and $FSH$) and ovarian hormones (estrogen and progesterone) fluctuate in a specific pattern.$1$. The $LH$ surge occurs around the $14^{th}$ day of the cycle,which triggers ovulation.$2$. After ovulation,the corpus luteum is formed,which secretes large amounts of progesterone.$3$. Consequently,progesterone levels rise significantly during the luteal phase (days $15-28$) to maintain the endometrium.$4$. Comparing the given graphs,the graph in option $A$ correctly shows the $LH$ surge at day $14$ and the subsequent rise in progesterone levels during the luteal phase.

Column $I$	Column $II$
$(a)$ Mons pubis	$(1)$ Embryo development
$(b)$ Antrum	$(2)$ Sperm cell
$(c)$ Trophoblast layer	$(3)$ External genitals of female
$(d)$ Mitochondria	$(4)$ Graafian follicle

Column $I$	Column $II$
$(a)$ Ovary	$(i)$ Human chorionic Gonadotropin
$(b)$ Placenta	$(ii)$ Estrogen and Progesterone
$(c)$ Corpus luteum	$(iii)$ Androgens
$(d)$ Leydig cells	$(iv)$ Progesterone only

Which is the correct graphical representation of the pituitary hormone and ovarian hormone levels during the menstrual cycle?

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

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Match the columns.

Column $I$ Column $II$

$(a)$ Mons pubis $(1)$ Embryo development

$(b)$ Antrum $(2)$ Sperm cell

$(c)$ Trophoblast layer $(3)$ External genitals of female

$(d)$ Mitochondria $(4)$ Graafian follicle

Match the following columns and select the correct option.

Column $I$ Column $II$

$(a)$ Ovary $(i)$ Human chorionic Gonadotropin

$(b)$ Placenta $(ii)$ Estrogen and Progesterone

$(c)$ Corpus luteum $(iii)$ Androgens

$(d)$ Leydig cells $(iv)$ Progesterone only

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