<prompt> A 33 year old lady present! with polydipsia and polyuria. Har symptoms staed soon after a road traffic accident 6 months ago. The blood pressure is 12080 mm Hg with no postural drop. The daily urinary output Is 6-8 liters. Investigation showed, Na 130 mEqL, KJ.5 mEqL, urea 15mgdL, sugar-65 mgdL. The plasma osmolality is 268 mosmolL and urine osmolatity 45 mosmolL. The most likely diagnosis is-Central diabetes insipidusNephrogenic diabetes insipidusResolving acute tubular necrosisPsychogenic polydipsia  <response>: here there is no thirst and polydipsia due to psychosis Harrison 17 pg 2219 