Read the following statements about the parathyroid gland and identify the true and false ones. Select the correct option after referring to the given table.
I. Human beings have a pair of parathyroid glands, situated in each lobe of the thyroid gland.
II. The secretion of PTH is regulated by the levels of circulating calcium ions.
III. PTH is a hypocalcemic hormone.
PTH plays a major role in maintaining calcium balance in the body along with TCT.