You are the HO (house officer) in the hospital and the lab report of a patient shows glucose 4mmol/l, K+ 5.2mmol/l, Na+ 129mmol/l. what is the most appropriate management?

The key is A. NS 0.9% [Here there is significant hyponatremia with mild hyperkalemia. Glucose is in lower normal level. Insulin can shift K+ in cells but this mild hyperkalemia does not need this treatment at this level. More over in lower blood glucose insulin may cause hypoglycemia. So the best management option is A. NS 0.9% which will correct the electrolyte imbalance (including K+ level by renal handling)].