(a) The adrenal medulla secretes two hormones called adrenaline and noradrenaline.(b) The pancreas is a composite glans that acts as both exocrine and endocrine glands. The endocrine pancreas consists of Islets of Langerhans. (c) Parafollicular cells are neuroendocrine cells in the thyroid whose primary function is to secrete calcitonin.(d) The adrenal cortex secretes many hormones called corticoids. The corticoids which are involved in carbohydrate metabolism are called glucocorticoids. So the correct option is adrenal cortex.