How many endocrine glands are located in the brain region?

Match the following lists (Hormone and its source of secretion):

List-$I$	List-$II$
$(a)$ Somatostatin	$(1)$ Pineal gland
$(b)$ Melatonin	$(2)$ Corpus luteum
$(c)$ Aldosterone	$(3)$ Placenta
$(d)$ Progesterone	$(4)$ Adrenal cortex
$(e)$ $HCG$	$(5)$ Islets of Langerhans
	$(6)$ Adenohypophysis

Match the columns and select the correct option:

Column-$I$	Column-$II$
$(a)$ Pituitary gland	$(i)$ Graves' disease
$(b)$ Thyroid gland	$(ii)$ Diabetes mellitus
$(c)$ Adrenal gland	$(iii)$ Diabetes insipidus
$(d)$ Pancreas	$(iv)$ Addison's disease

Arrange the following events in the correct sequence for the regulation of blood sugar level:
$(i)$ Increase in blood sugar level
$(ii)$ Increase in circulating glucagon
$(iii)$ Release of glucose from glycogen
$(iv)$ Decrease in blood sugar level

Given below is an incomplete table about certain hormones, their source glands, and one major effect on the human body.
Identify the correct option for the three blanks $A$, $B$, and $C$.

Gland	Secretion	Effect on Body
$A$	Oestrogen	Maintenance of secondary sexual characters
Alpha cells of islets of Langerhans	$B$	Raises blood sugar level
Anterior pituitary	$C$	Over secretion leads to gigantism

Complete the following analogies:
$1$. Antidiuretic hormone : Diabetes insipidus :: $\beta$-cells of pancreas : ......
$2$. Corpus luteum : Progesterone :: Leydig cells : ......
$3$. $GIP$ : Gastric inhibitory peptide :: $CCK$ : ......