This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell Physiology and Intercellular Connections, Subject name: Physiology
[{'content': 'The chief intracellular ion in our body is? \nSelect and explain. \nA. K+, B. Na+, C. Ca", D. Mg"', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) K+ (Potassium)Ref : Ganong 25th ed. / 9Normal serum potassium= 3.5-5.5 meq/dlIntracellular potassium= 150 meq/dl', 'role': 'assistant'}]