This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Hyperpolarization is due to \nSelect and explain. \nA. Influx of chlorine, B. Influx of potassium, C. Influx of sodium, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In hyperpolarization the membrane becomes more negative It is due to continued potassium efflux or chloride ion influx. Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:67,68,69', 'role': 'assistant'}]