<prompt> Which of the following doesnt cause metabolic acidosis-Pyloric stenosisRenal failureUreterosigmoidostomyPancreatic Fistula  <response>: Uretrosigmoidostomy and pancreatic fistula causes non anion gap metabolic acidosis, whereas renal failure causes high anion gap acidosis. Ref: Harrisons principles of internal medicine,19E pg 320 