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
[{'content': 'Treatment of choice for SIADH is ? \nSelect and explain. \nA. Lithium carbonate, B. Demeclocycline, C. Vasopressin, D. Hypertonic Saline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]