- Gonads (Ovaries in females, Testes in males) (I) produce sex hormones such as estrogen, testosterone, and progesterone. Progesterone is listed in List II (B). - The Pituitary gland (II) is often called the "master gland" and secretes many hormones, including Growth Hormone (C). - The Pancreas (specifically the islets of Langerhans) (III) produces hormones that regulate blood sugar levels, primarily Insulin (A) and Glucagon. - The Adrenal glands (IV) produce a variety of hormones, including corticosteroids like Cortisone (D), adrenaline, and noradrenaline.