Oxytocin helps in

Name the hormones $A, B,$ and $C$ in the given figure.

The mammary gland is a modification of which of the following glands in Eutherians?

The hormone that acts during parturition (child birth) but which has more effect on lactation is

$A$: Corticotrophin-releasing hormone is a part of the clock that establishes the timing of birth.
$R$: The signals for parturition originate from the fully developed foetus and placenta,which induce mild uterine contractions called the foetal ejection reflex.

Which of the following hormones stimulates milk secretion in females?