Question: Which of the following would best distinguish an otherwise healthy person with severe water deprivation from a person with the syndrome of inappropriate antidiuretic hormone (SIADH; a syndrome characterized by too much inappropriate ADH secretion)? Need Assignment Help? (A) A dilute hypoosmotic urine (B) Urine osmolarity (C) Plasma osmolarity (D) Circulating levels of antidiuretic hormone (ADH) (E) Hyperosmotic gradient in the medulla