Manifestation of masculinity patterns in females due to hormonal effects is known as

Match the following columns:

Column-$I$ (Gland)	Column-$II$ (Hormone)
$P$. Thyroid gland	$I$. $PTH$
$Q$. Parathyroid gland	$II$. Melatonin
$R$. Thymus	$III$. Thymosin
$S$. Pineal gland	$IV$. $T_3$

Intercellular communication in multicellular organisms occurs through

Select the correct option:
$(1)$ Thyrocalcitonin maintains the level of sodium / calcium in the blood.
$(2)$ Thymosin of the thymus gland is a steroid / peptide hormone.
$(3)$ The adrenal cortex secretes many hormones. They are commonly called corticoids / catecholamines.
$(4)$ Glucagon / Insulin is secreted from the $\alpha$-cells of the pancreas.

Find the odd one out with respect to the gland and its secretions.

Give scientific reasons:
$(1)$ Hormones are regulatory chemicals.
$(2)$ Less secretion of thyroxine results in stunted growth of a person.
$(3)$ Deficiency of insulin results in diabetes mellitus.
$(4)$ Pancreas is an exocrine and endocrine gland.