Disease caused by deficiency of iodine is

Steroid hormone is derived from

Function of relaxin hormone is

The organ which was considered vestigial till recently but now confirmed to be endocrine gland is

Hormones originating in the hypothalamic neurons, pass through ... $A.... \ldots$ and are released from their ...$B$... endings. These hormones reach the ...$C$... gland through a ...$D$... circulatory system and regulate the functions of the ...$E$... pituitary

Select the correct combination of $A , B$ and $C$ in reference to above paragraph

Rate of hormone synthesis and secretion depends upon