This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid & Electrolyte, Subject name: Medicine
All are indications for dialysis in a case of acute renal failure except: 
Select and explain. 
A. Uremia, B. Hyponatremia, C. Hyperkalemia, D. Metabolic acidosis
B: Hyponatremia
Answer: B: Hyponatremia 
Explanation: Ans: B (Hyponatremia) Ref: Harrison's principles of Internal Medicine. 18th edition. 2012. Chapter 279.Explanation:Indications for Dialysis in ARFVolume overload,Hyperkalemia.Metabolic acidosis,In some toxic ingestionsSevere complications of uremia (asterixis, pericardial rub or effusion, encephalopathy, uremic bleeding).