<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 39-year-old woman is brought to the emergency department in a semi-unconscious state by her neighbor who saw her lose consciousness. There was no apparent injury on the primary survey. She is not currently taking any medications. She has had loose stools for the past 3 days and a decreased frequency of urination. No further history could be obtained. The vital signs include: blood pressure 9462 mm Hg, temperature 36.7C 98.0F, pulse 105min, and respiratory rate 10min. The skin appears dry. Routine basic metabolic panel, urine analysis, urine osmolality, and urine electrolytes are pending. Which of the following lab abnormalities would be expected in this patient?? A: Urine osmolality 350 mOsmkg, B: Urine Na 40 mEqL, C: Fractional excretion of sodium FENa 2, D: Serum blood urea nitrogencreatinine BUNCr 20, E: Serum creatinine 1 mgdL,  <response>: This is a clinical vignette about a 39-year-old woman brought to the emergency department in a semi-unconscious state. She has a history of loose stools for 3 days, decreased urination, hypotension, tachycardia, hypothermia, and dry skin. The question asks which lab abnormality would be expected in this patient. Based on the history and vital signs, this patient is likely volume depleted from gastrointestinal losses loose stools. This would lead to prerenal azotemia with concentrated urine and sodium retention. The serum BUNCr would be elevated. FENa would be low in prerenal azotemia. The urine osmolality would be high and urine sodium low in volume depletion. The serum creatinine may be normal or slightly elevated in acute kidney injury.D: Serum blood urea nitrogencreatinine BUNCr 20 