Which of the following can be termed as the milk-ejecting hormone?

Which of the following hormones helps in the contraction of the uterus during childbirth?

$ACTH$ (Adrenocorticotropic hormone) consists of how many amino acid units?

Acromegaly results after adolescence due to excess production of one of the following hormones:

Which pituitary hormone in rabbits controls protein metabolism and skeletal growth?

$A$: Oxytocin stimulates contraction of uterine muscles during birth and initiates ejection of milk.
$R$: It is synthesized in the posterior lobe of pituitary.