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': 'Repolarization is due to \nSelect and explain. \nA. Sodium, B. Efflux of potassium, C. Influx of potassium, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Repolarization occurs mainly due efflux of potassium Inactive gates of sodium channels also close Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:66,67', 'role': 'assistant'}]