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
The treatment of choice in acute hyperkalemia of life threatening to cardiac myocytes is - 
Select and explain. 
A. Infusion of calcium gluconate, B. Oral resins, C. Intravenous infusion of insulin, D. P blocker
A: Infusion of calcium gluconate
Answer: A: Infusion of calcium gluconate 
Explanation: Ans. is 'a' i.e. Infusion of calcium gluconate EMERGENCYModalityMechanism of actionOnsetDurationCalcium gluconateAntagonizes cardiac conduction abnormalities0-5 minutes1 hourSodium BicarbonateDistributes K+ into cells(only indicated with acidosis)15-30 minutes1 -2 hoursInsulinDistributes K+into cells15-60 minutes4-6 hoursAlbuterolDistributes K+ into cells15-30 minutes2-4 hoursNONEMERGENCYModalityMechanism of actionDuration of treatmentLoop diuretic| Renal K4 excretion0.5-2 hoursSodium polystyrene sulfonate (kayexalate)Ion-exchange resinbinds K+1 -3 hoursHemodialysisExtracorporeal K+removal48 hoursPeritoneal dialysisPeritoneal K+ removal48 hours