What is the cause of dwarfism?

The pituitary gland is derived from which germ layer?

With reference to the pituitary gland,which of the following statements is true?

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.

Which of the following is not secreted by the pituitary gland?

Simmonds' disease is .....