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': 'A 33-year-old lady presents with polydipsia and polyuria. Her symptoms started soon after a road traffic accident 6 months ago. The blood pressure is 120/80 mm Hg with no postural drop. The daily urinary output is 6-8 litres. Investigation showed, Na 130 mEq/L, K.3.5 mEq/L, urea 15mgAIL, sugar-65 mg/dL. The plasma osmolality is 268 mosmoUL and urine osmolality 45 mosmol/L. The most likely diagnosis is - \nSelect and explain. \nA. Central diabetes insipidus, B. Nephrogenic diabetes insipidus, C. Resolving acute tubular necrosis, D. Psychogenic polydipsia', 'role': 'user'}, {'content': "Answer: D \nExplanation: First lets go through the normal values of the indices required to solve this question\u200b\n\nSerum Sodium (Na) →\xa0136-145 meq/L\nSerum Potassium →\xa03.5-5.0 meq/L\xa0\nSerum Osmolality →\xa0285-295 mmol/kg\xa0\nSerum Urea →\xa010-20 mg/dL 350\nUrine Osmolality\xa0→ 350 -1000 mosmol/kg.\n\nLet's see the values in the patient\n\n- Serum sodium\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0→\xa0\xa0\xa0\xa0 decreased\n- Serum Osmolality\xa0\xa0\xa0→\xa0 \xa0decreased\n- Urine Osmolality\xa0\xa0\xa0\xa0\xa0→\xa0\xa0decreased", 'role': 'assistant'}]