Answer:
The correct answer will be- by inhibiting the reabsorption of phosphate in tubules of kidney.
Step-by-step explanation:
Parathyroid hormone is the hormone produced from the parathyroid gland which is known to maintain the level of calcium in the serum of the blood.
The hormone produced act on the bone, kidney and the intestine to maintain the calcium levels as hormone leads to the osteoclast of the bone which releases calcium and phosphate into the blood.
The phosphate ions can form water-insoluble salts with calcium so phosphate needs to be excreted out in large amount. This is done by the inhibition of the reabsorption of phosphate which excretes out a large amount of phosphate with urine.
Thus, by inhibiting the reabsorption of phosphate in tubules of the kidney is the correct answer.