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: Surgery
[{'content': 'The contribution of operation of sodium potassium electrogenic pump for the development of net -90 millivolt on resting membrane potential is \nSelect and explain. \nA. -4 millivolt, B. -80 millivolt, C. -70 millivolt, D. +4 millivolt', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]