A Patient Is Hospitalized with Possible SIADH

A patient is hospitalized with possible SIADH. The patient is confused and reports a headache, muscle cramps, and twitching. The nurse would expect the initial laboratory results to include a

A) serum sodium of 125 mEq/L (125 mmol/L) .
B) hematocrit of 52%.
C) blood urea nitrogen (BUN) of 22 mg/dl (11.5 mmol/L) .
D) serum chloride of 110 mEq/L (110 mmol/L) .