Acromegaly is caused by the irregular secretion of which gland?

The abbreviation $TSH$ stands for

$A$ milkman is very upset one morning as his cow refuses to give any milk. The milkman's wife gets the calf from the shed. On feeding by the calf,the cow gave sufficient milk. Describe the role of the endocrine gland and the pathway associated with this response.

Over-secretion of growth hormone during the growth period results in:

Inadequate production of $STH$ in early life may result in:

Hormones originating in the hypothalamic neurons are released in the posterior pituitary from the ....$A$.... of neurons. The inhibitory and releasing hormones that regulate the functions of the ...$B$... pituitary reach there via ...$C$... circulatory system.
Select the correct combination of $A, B$ and $C$ in reference to the above paragraph.