Which of the Following Laboratory Findings Support the Diagnosis of Hypoparathyroidism

Which of the following laboratory findings support the diagnosis of hypoparathyroidism?

A) Serum calcium = 10.0 mg/dL; Serum potassium = 5.5 mg/dL
B) Serum calcium = 8.7 mg/dL; Serum potassium = 3.0 mg/dL
C) Serum calcium = 11.0 mg/dL; Serum phosphorus =2.0 mg/dL
D) Serum calcium = 7.5 mg/dL; Serum phosphorus = 5.5 mg/dL