When Taking the Blood Pressure of a Client After a Parathyroidectomy,the

When taking the blood pressure of a client after a parathyroidectomy,the nurse notes that the client's hand has gone into flexion contractions.Which laboratory result does the nurse correlate with this condition?

A) Serum potassium, 2.9 mEq/L
B) Serum potassium, 5.8 mEq/L
C) Serum sodium, 122 mEq/L
D) Serum calcium, 6.9 mg/dL