The hyposecretion of which hormone leads to loss of sodium and water through urine, low blood pressure and hypotension?

Name the three main regions of adrenal cortex.

The mineralocorticoid hormone of the adrenal cortex which causes the $Na$retention and $K$ excretion is

$I.$ The adrenal cortex secretes many hormones called corticoids     $II.$ Corticoids involved in carbohydrate metabolism are called glucocorticoids      $III.$ Cortisol is main glucocorticoids   $IV.$ Aldosterone is the main mineralocorticoids

Select the correct combination from the given options

Which of the following is not under direct control of pituitary gland with respect to the regulation of its secretory function