A nurse is reviewing the laboratory results for four clients. The nurse should recognize which of the following clients has a manifestation of hypoparathyroidism?

A client who has a magnesium of 1.8 mEq/L (Range of 1.3 to 2.1 mg/dL).

A client who has a vitamin D of 25 ng/mL (Range of 25 to 80ng/mL).

A client who has a calcium of 9.8 mg/dL (Range of 9.0 to 10.5 mg/dL).

A client who has a Calcium of 5.7 mg/dL (Range of 9.0 to 10.5 mg/dL).