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: Medicine
[{'content': 'Cornerstone of therapy for chronic hyponatremia is which of the following intervention? \nSelect and explain. \nA. Vasopressin antagonists, B. Hypeonic 3% saline, C. Water deprivation, D. Demeclocycline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Water deprivation has long been a cornerstone of therapy for chronic hyponatremia. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 347', 'role': 'assistant'}]