<prompt> Which of these can cause hypocalcemia:ThyroxineCalcitoninCalcitoninCholoecalciferol  <response>: B i.e. CalcitoninCalcitonin, a hormone secreted by parafollicular cells or C cellQ of thyroid gland, lowers the serum calcium levelQ. Effect of Hormone on Calcium Phosphate LevelHormoneSerum CalciumSerum phosphateVit DIncreasesQIncreaseQPTHIncreasesQDecreaseQCalcitoninDecreasesQDecreaseQ 