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
Hypertonic urine is excreted due to absorption of water in 
Select and explain. 
A. Collecting ducts, B. DCT, C. Ascending part of loop of Henley, D. Descending part of loop of Henley
A: Collecting ducts
Answer: A: Collecting ducts 
Explanation: Concentrated urine is formed due to the reabsorption of water in collecting ducts.