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
Most common cause of hypernatremia 
Select and explain. 
A. Adipsic diabetes insipidus, B. Carcinoid syndrome, C. Renal losses, D. Sweating
C: Renal losses
Answer: C: Renal losses 
Explanation: Ans. is `c' i.e., Renal losses Major causes of hypernatremia Unreplaced water loss (which requires an impairment in either thirst or access to water) Insensible and sweat losses Gastrointestinal losses Central or nephrogenic diabetes insipidus o Osmotic diuresis Glucose in uncontrolled diabetes mellitus Urea in high-protein tube feedings Mannitol Hypothalamic lesions impairing thirst or osmoreceptor function Primary hypodipsia Reset osmostat in mineralocoicoid excess Water loss into cells Severe exercise or seizures Sodioutn overload Intake or administration of hypeonic sodium solutions