A fall in blood Ca2+ level is most likely to occur due to
Hyposecretion of PTH
Hypersecretion of PTH
Hyposecretion of TCT
Hyposecretion of hGH
PTH is a hypercalcemic hormone (increases blood Ca2+ levels). Hyposecretion of PTH causes low levels of blood Ca2+ leading to tetany of skeletal muscles.