This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Hypokalemia in an infant may be due to all of the following except – 
Select and explain. 
A. Adrenal tumor, B. Acute renal failure, C. Thiazide therapy, D. Diarrhea
B: Acute renal failure
Answer: B: Acute renal failure 
Explanation: Hypokalemia

Hypokalemia is defined as serum potassium values of less than 3.5 meq/L.