<prompt> Most common cause of hypernatremia?Primary hypodipsiaCarcinoid syndromeRenal lossesSweating  <response>: Elderly individuals with reduced thirst andor diminished access to fluids are at the highest risk of developing hypernatremia. Patients with hypernatremia may rarely have a central defect in hypothalamic osmoreceptor function, with a mixture of both decreased thirst and reduced AVP secretion 