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
Metabolic changes associated with excessive vomitting includes the following: 
Select and explain. 
A. Metabolic acidosis, B. Hyperchloremia, C. Hypokalemia, D. Decreases bicarbonates
C: Hypokalemia
Answer: C: Hypokalemia 
Explanation: Answer is C (Hypokalemia) Loss of gastric secretions results in Hypokalemia. Loss of gastric contents results in volume depletion and metabolic alkalosis both of which promote kaliuresis. (Leads to hypokalemia) Repeated vomitings may have many deleterious effect: Aspiration Pneumonitis may be seen in the unconscious.