This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Resting membrane potential of nerve is equal to equilibrium potential of \nSelect and explain. \nA. Na+, B. Cl-, C. K+, D. HCO3-', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Chloride ion', 'role': 'assistant'}]