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
What is the metabolic abnormalities sign in congenital hypertrophic pyloric stenosis 
Select and explain. 
A. Hyperkalemic metabolic alkalosis, B. Hypokalemic metabolic alkalosis, C. Hypokalemic metabolic acidosis, D. Hyperkalemic metabolic acidosis
B: Hypokalemic metabolic alkalosis
Answer: B: Hypokalemic metabolic alkalosis 
Explanation: It will cause hypokalemic hypochloremic metabolic alkalosis with aciduria