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
[{'content': 'Hypokalemia is - \nSelect and explain. \nA. <3.5, B. <4.5, C. <5.6, D. <6.5', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., < 3.5 Serum potassiumo Normal-3.5 - 5.0 mmol'Lo Hypokalemia-<3.5o Hyperkalemia->5-6meq.'L", 'role': 'assistant'}]