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: Surgery
Antral obstruction with vomiting is NOT characterised by: 
Select and explain. 
A. Hypokalemia, B. Hypochloremia, C. Acidosis, D. Hyponatremia
C: Acidosis
Answer: C: Acidosis 
Explanation: Repeated vomiting leads to hypochloremic, hypokalemic metabolic alkalosis. Acidosis is not seen. Ref: Schwaz 9/e, Page 1426; Nelson 17/e, Page 1229.