This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluids & Electrolyte Disorders - Acid-Base Balance, Subject name: Surgery
Recurrent vomiting due to intestinal obstruction causes- 
Select and explain. 
A. Respiratory acidosis, B. Respiratory alkalosis, C. Metabolic acidosis, D. Metabolic alkalosis
D: Metabolic alkalosis
Answer: D: Metabolic alkalosis 
Explanation: Ans. is 'd' i.e.. Metabolic alkalosis