The correct option is a. Hypothalamus, posterior pituitary.
This is a polypeptide hormone most commonly stimulated in females during the birth of the child. It causes contraction in uterine walls which helps the fetus to come out. it also helps in the release of milk during the lactation period.
ADH is also known as vasopressin hormone. ADH acts as a water-saving hormone and is released into the bloodstream to vasoconstrict and reabsorb water from the kidney's collecting duct; this ensures the equilibrium of intracellular and extracellular contents.
Learn more about ADH here:- https://brainly.com/question/3779530
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