<prompt> Central diabetes insipidus is characterized by?Low plasma and low urine osmolalityHigh plasma and high urine osmolalityLow plasma and high urine osmolalityLow urine and high plasma osmolality  <response>: Is characterized by ADH which leads to loss of H2O so urine will be diluted and plasma will be concentrated. Low urine High plasma Osmolality in Central D.I SIADH Gain of water DIloss of water Urine osmolality Plasma osmolality Na concentration Dilutional hyponatremia Relative hypernatremia 