This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Ascending loop of Henle has which transpoer \nSelect and explain. \nA. Na+ Cl contraspoer, B. Na+ - 2Cl - K+ cotranspoer, C. ENaC channel, D. Na+ aminoacid contraspoer', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ascending loop of Henle has Na+ - 2Cl - K+ cotranspoer. Ref: Ganong's review of medical physiology; 24th edition; page no; 685 ref of image :", 'role': 'assistant'}]