This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Electrolyte Imbalance, Subject name: Medicine
All of the following are causes of hypovolemic hyponatremia lead to urine sodium > 20 except? 
Select and explain. 
A. Renal losses, B. Vomiting, C. Cerebral salt wasting syndrome, D. Mineralocoicoid deficiency
B: Vomiting
Answer: B: Vomiting 
Explanation: OPTION B - Vomiting It will induce dehydration and lead to renal conservation of salt and water . OPTION A - Renal Losses Tubular damage explains salt wasting and high urine sodium. OPTION C - Cerebral salt wasting syndrome Release of BNP will promote natriuresis and salt wasting . OPTION D - Mineralocoicoid deficiency Aldosterone deficiency will also cause salt wasting .