The correct option is
C PTH
- Parathormone of parathyroid gland reduces the blood phosphate level while increases the blood calcium level.
- Therefore, its hypersecretion causes hypercalcemia which makes option C correct.
- Calcitonin hormone stimulates a temporary reduction in the number and activity of osteoclasts and thereby reducing the blood calcium level to normal. Calcitonin is also called as TCT.
- Aldosterone stimulates renal absorption of sodium ions and water to regulate blood volume.
So, the correct answer is option C.