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: Surgery
[{'content': 'In a patient if administration of vasopressin does not increase the osmolality of urine, it indicates? \nSelect and explain. \nA. ADH deficieny, B. Renal hyposensitivity towards ADH, C. SIADH, D. Psychogenic polydipsia', 'role': 'user'}, {'content': "Answer: B \nExplanation: Renal hyposensitivity towards ADH REF: Harrison's 17th ed p. 274 If the osmolality of urine increases after administration of ADH - Nephrogenic DI (Renal hyposensitivity) If the osmolality of urine decreases after administration of ADH- Central DI", 'role': 'assistant'}]