The correct option is C GHRH
The hypothalamus is the master regulator of the body. It secretes stimulating or inhibiting hormones. For example, Growth Hormone Releasing Hormone (GHRH) is secreted by the hypothalamus. Its target organ is pituitary gland as it instructs the pituitary gland to produce and secrete growth hormone (GH) or somatotropin. This hormone functions in muscle growth, bone growth, breakdown of fats from adipocytes and breakdown of glycogen in the liver.