Question of the Week #10 A 3-year-old female has a serum sodium of 128 mmol/L two days after resection of a large brain tumor. Which of the following would be the MOST useful in distinguishing cerebral salt wasting syndrome from syndrome of inappropriate antidiuretic hormone?A. Serum sodiumB. Serum osmolalityC. Clinical volume statusD. Urine sodium Time is Up!