Medicine General 4dc5b4b5 A patient presents with acute gastroenteritis in a dehydrated state. Which of the following conditions is highly suggestive of pre-renal renal failure? A Urinary sodium > 40 m mol; Urine osmolality <350m osm/L B Urinary sodium > 40 m mol; Urine osmolality > 500m osm/L C Urinary sodium < 20 m mol; Urine osmolality > 500m osm/L D Urinary sodium < 20 m mol; Urine osmolality < 350m osm/L High-Yield Explanation No explanation provided.