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
Characteristic feature of cells of collecting duct are 
Select and explain. 
A. Pressure of brush border, B. Pressure of carbonic anhydrase in lumimal membrane, C. It has leaky tight junction, D. Para cellular transport not possible
D: Para cellular transport not possible
Answer: D: Para cellular transport not possible 
Explanation: Features of collecting duct cells :

No brush border
No carbonic anhydrase in lumimal membrane
Has 'tight' tight junction
Para cellular transport not possible