The correct option is C MSH
MSH or melanocyte stimulating hormone is secreted by the pars intermedia of the pituitary. It stimulates melanocytes in the skin to produce the pigment melanin, and hence regulates the pigmentation of the skin.
ACTH or adrenocorticotropic hormone is released by the anterior pituitary to stimulate the adrenal cortex to secrete glucocorticoids.
Calcitonin is secreted by the thyroid gland and stimulates the deposition of calcium ions in bones.
TSH or thyroid stimulating hormone is released by the anterior pituitary and stimulates the thyroid gland to secrete T3 and T4.