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
Of the various modalities used in the treatment of re-threatening effects of hyperkalemia which one of the following as the most rapid onset of action ? 
Select and explain. 
A. Hemodialysis, B. Sodium bicarbonate infusion, C. Insulin and glucose infusion, D. Intravenous calcium gluconate
A: Hemodialysis
Answer: A: Hemodialysis 
Explanation: None