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: Pharmacology
Site of action of anti diuretic hormone is : 
Select and explain. 
A. Loop of Henle, B. Proximal tubule, C. Distal tubule, D. Cortical collecting duct
D: Cortical collecting duct
Answer: D: Cortical collecting duct 
Explanation: None