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
Which one of the following is not responsible for concentration of urine in the kidney - 
Select and explain. 
A. Aldosterone, B. Angiotensinn, C. Vasopressin, D. Epinephrine
D: Epinephrine
Answer: D: Epinephrine 
Explanation: D i.e. Epinephrine