This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluids and Electrolyte Imbalance, Subject name: Medicine
All are useful for treatment of metabolic alkalosis except? 
Select and explain. 
A. Sodium chloride, B. Potassium chloride, C. Hydrochloric acid, D. Ammonium chloride
D: Ammonium chloride
Answer: D: Ammonium chloride 
Explanation: Normal saline is useful if volume contraction is present PPI is given if H+ is lost from stomach or kidney Dilute HCL (0.1N HCL) can be effective but can lead to hemolysis and hence should be given slowly a central line KCL will correct K+ deficits due to hyperaldosteronism