Lorain-Levi syndrome is caused by the deficiency of:

In human adult females,oxytocin:

The accumulation and release centre of pituitary gland hormones is:

The activity of the adrenal cortex is governed by a pituitary hormone abbreviated as:

$GnRH$ stimulates . . . . . . $A$ . . . . . . to produce/release . . . . . . $B$ . . . . . . .

Select the correct option for each statement:
$(1)$ Hormones are non-nutrient/nutrient chemicals which act as intercellular messengers and are produced in trace amounts.
$(2)$ The posterior pituitary gland is under the direct neural/endocrine regulation of the hypothalamus.
$(3)$ The hormone produced by the posterior pituitary gland is oxytocin/prolactin.