This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'In a woman with polyuria of6L/day, which are the 2 most impoant investigations to be done - \nSelect and explain. \nA. Water deprivation test, B. Water loading, C. Plasma and urine osmolality, D. Plasma osmolality', 'role': 'user'}, {'content': 'Answer: A \nExplanation: fluid deprivation test to differentiate which type of DI. If it is not significant administration of desmopressin required ( Harrison 17 pg 2219)', 'role': 'assistant'}]