This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
Rapid infusion of insulin cause: 
Select and explain. 
A. Hyperkalemia, B. Hypokalemia, C. Hypernatremia, D. Hyponatremia
B: Hypokalemia
Answer: B: Hypokalemia 
Explanation: Ans. (b) Hypokalemia(Ref: Ganong, 25th ed/p.432)Insulin causes potassium ions to enter into the cell. This action decreases extracellular potassium levels (hypokalemia)