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': 'Sodium-potassium pump is a type of ? \nSelect and explain. \nA. Passive transpo, B. Primary active transpo, C. Secondary active transpo, D. Counter transpo', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Primary active transpo", 'role': 'assistant'}]