The correct option is D a - CRH, b - ACTH
The hypothalamic hormone called the corticotropin-releasing hormone (CRH) acts on the pituitary gland and stimulates the synthesis and release of adrenocorticotropic hormone (ACTH).
ACTH is turn stimulates the adrenal cortex to release glucocorticoid hormones including cortisol, which help the body respond to stress.
Growth hormone secreted by the pituitary gland is responsible for the growth of the body.
TSH or thyroid stimulating hormone, released by the pituitary, stimulates the thyroid gland to release thyroxine.
TRH or thyrotropin-releasing hormone, secreted by the hypothalamus, stimulates the anterior pituitary to release TSH.