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: Medicine
Causes of hyperkalemia includes all except - 
Select and explain. 
A. Crush syndrome, B. Haemolysis, C. Renal failure, D. Intestinal obstruction
D: Intestinal obstruction
Answer: D: Intestinal obstruction 
Explanation: None