A 73-Year-Old Woman Is Hospitalized with Possible SIADH

A 73-year-old woman is hospitalized with possible SIADH.She is confused and reports a headache,muscle cramps,and twitching.Initially,which of the following laboratory results would the nurse expect to find?

A) Hematocrit of 0.52 (52%)
B) Blood urea nitrogen of 7.9 mmol/L (22 mg/dL)
C) Serum sodium of 124 mmol/L
D) Serum chloride of 111 mmol/L