This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gram-Positive Infections - Corynebacterial Infections, Subject name: Surgery
Condition which does not cause metabolic acidosis: 
Select and explain. 
A. Renal failure, B. Ureterosigmoidostomy, C. Pancreatic or biliary fistula, D. Pyloric stenosis
D: Pyloric stenosis
Answer: D: Pyloric stenosis 
Explanation: Ans. (d) Pyloric stenosis* Pyloric stenosis, Chronic DU with cauterization and other causes of GOO Causes# Hypochloremia# Hypokalemia# Hyponatremia# Metabolic alkalosis# Paradoxical aciduria