The correct option is B Prolactin
Prolactin is the hormone associated with milk production and secretion in the case of mammals. Term Lactin is related to milk. Prolactin (PRL) , also known as luteotropic hormone or luteotropin is a protein that in humans is best known for its role in enabling female mammals to produce milk. Prolactin is secreted from the pituitary gland in response to eating, mating, estrogen treatment, ovulation and nursing. Prolactin is secreted in a pulsatile fashion in between these events. Prolactin also plays an essential role in: metabolism, regulation of the immune system and pancreatic development.