<prompt> Answer this question truthfullyWhat classification does hypocalcemia fall under?  <response>: <reason> Hypocalcemia may be classified functionally into the following sub-types:Absence of PTH is primarily seen in Hereditary hypoparathyroidism Acquired hypoparathyroidism e.g. surgical resection HypomagnesemiaPTH insufficiency is seen when the active form of vitamin D 1,25 di-Hydroxy-Vitamin D or Vitamin D3 is lacking. This may be seen in Reduced dietary intake of vitamin D Insufficient exposure to sunlight Vitamin D -dependent rickets type 1 Chronic renal failure PTH insufficiency is seen in active vitamin D ineffectiveness which is seen in Intestinal malabsorption Vitamin D -dependent rickets type 2 PseudohypoparathyroidismPTH overactivity is seen in Severe hypophosphatemia Tumor lysis syndrome Acute renal failure Rhabdomyolysis 