Which function does the lth perform?
it stimulates ovaries to secrete estrogen for the growth of ovarian follicles
ob.
oc.
it triggers release of eggs from the ovarian follicle.
it regulates skin pigmentation.
od.
it activates the functions of the thyroid gland.
oe.
it stimulates the production of milk in the mammary glands.

E. It stimulates the production of milk in the mammary glands.

Explanation:

In mammals, the luteotropic hormone (LTH), also known as prolactin, is a protein hormone released from the pituitary gland. This hormone is extremely important in females because it is involved in the production of milk in the mammary glands, reason behind its coloquial term "the milk hormone."

However, according to researchers, it has over 300 functions in the human body. LTH is not only produced in the pituitary gland, but also in the uterus, adipose issue, skin, and even in the brain. Moreover, its production is highly correlated with dopamine levels. The more dopamine in the body, the less prolactin is produced. High levels of LTH lead to a disorder known as hyperprolactinaemia, while low levels lead to hypoprolactinaemia.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.