Chromophil cells are found in

Given below are two statements.
Statement $I$ - Highest secretion of growth hormone $(GH)$ is seen till puberty.
Statement $II$ - The $GH$ is secreted continuously throughout life for repair and replacement of cells.
In the light of above statements,select the correct option given below:

Gametokinetic factor is

Hypersecretion of $STH$ results in .....

$A$: Synthesis of milk is stimulated by a rise in the level of oxytocin.
$R$: Oxytocin is released from the adenohypophysis under the influence of the hypothalamus.

Which hormone regulates the development of mammary glands and the secretion of milk in them?