PTH does not cause -: (A) Maintains serum Ca2+, (B) Ca2+ retention, (C) Decreased PO43- excretion, (D) May cause osteolysis
Answer is C. Effect of parathyroid hormone
On calcium

It increases serum calcium level by


Increases resorption of calcium from bone → This is the most prominent action.
Stimulates reabsorption of Ca by kidney
Stimulates renal activation of it. D which increases intestinal absorption of calcium 

On Phosphorus

Decrease the level of PO43- in Serum by decreasing PO43- reabsorption in the kidney.