The correct option is A ACTH
Adrenocorticotropic hormone (ACTH) is one of the trophic hormones released by the anterior pituitary. It stimulates the adrenal cortex to synthesize and secrete glucocorticoids such as cortisol, which help the body to respond to stressful situations.
MSH is melanocyte-stimulating hormone, which stimulates melanocytes to produce the skin pigment melanin.
Triiodothyronine (T3) is a thyroid hormone, which regulates the body metabolism.
TSH (thyroid stimulating hormone) is another trophic hormone released by the anterior pituitary and it stimulates the thyroid to release T3 and T4.