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': 'Maximum equilibrium potential is for - \nSelect and explain. \nA. Na+, B. K+, C. Cl-, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., K+", 'role': 'assistant'}]