This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Medicine
Rapid infusion of insulin causes- 
Select and explain. 
A. Hyperkalemia, B. Hypokalemia, C. Hypernatremia, D. Hyponatremia
B: Hypokalemia
Answer: B: Hypokalemia 
Explanation: * Insulin, b2-adrenergic activity, thyroid hormone, and alkalosis promote Na+/K+-ATPase-mediated cellular uptake of K+, leading to hypokalemia. * stimulation of endogenous insulin can provoke hypokalemia, hypomagnesemia, and/or hypophosphatemia in malnourished patients given a carbohydrate load. (reference harrisons principles of internal medicine, 19E page-305)