Which of the following hormones of the human body regulate blood calcium and phosphate?
a)	Glucagon	b)	Growth hormone	c)	Parathyroid hormone	d)	Thyroxine

(c)

Parathormone or collips’ hormone helps to regulate the metabolism of calcium and certain other minerals like phosphate. It decreases the phosphate level in the blood by stimulating, the kindely to eliminate phosphate in the urine. It also stimulates the bone destroying cells to break down bone and release both calcium and phosphate.