This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Nernst potential of Na+ is 
Select and explain. 
A. 94, B. 61, C. -64, D. -94
B: 61
Answer: B: 61 
Explanation: Equilibrium potential of ions is calculated by NERNST EQUATION. For Na, it is +60 mV to +55mV approximately (REF: GANONG'S REVIEW OF MEDICAL PHYSIOLOGY -23rd EDITION. Page No-7)