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
The chief intracellular ion in our body is? 
Select and explain. 
A. K+, B. Na+, C. Ca", D. Mg"
A: K+
Answer: A: K+ 
Explanation: Ans. (a) K+ (Potassium)Ref : Ganong 25th ed. / 9Normal serum potassium= 3.5-5.5 meq/dlIntracellular potassium= 150 meq/dl