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': 'Characteristic feature of cells of collecting duct are \nSelect and explain. \nA. Pressure of brush border, B. Pressure of carbonic anhydrase in lumimal membrane, C. It has leaky tight junction, D. Para cellular transport not possible', 'role': 'user'}, {'content': "Answer: D \nExplanation: Features of collecting duct cells :\n\nNo brush border\nNo carbonic anhydrase in lumimal membrane\nHas 'tight' tight junction\nPara cellular transport not possible", 'role': 'assistant'}]