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
[{'content': 'Nernst potential of Na+ is \nSelect and explain. \nA. 94, B. 61, C. -64, D. -94', 'role': 'user'}, {'content': "Answer: B \nExplanation: 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)", 'role': 'assistant'}]