This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
[{'content': 'Desmopressin is a synthetic analog of ADH. It is preferred over arginine vasopressin in the treatment of diabetes insipidus for all of the following reasons EXCEPT: \nSelect and explain. \nA. It is a more potent antidiuretic, B. It is a selective vasopressin V1 receptor agonist, C. It has a little vasoconstrictor activity, D. It is longer acting', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Vasopressin can act on V1 and V2 receptors whereas desmopressin is a selective V2 receptor agonist. Desmopressin: It is a more potent antidiuretic It is longer acting It has a little vasoconstrictor activity', 'role': 'assistant'}]