This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Hyperophic pyloric stenosis what to be normalized before surgery 
Select and explain. 
A. Potassium, B. Bicarbonate, C. Calcium, D. Water
B: Bicarbonate
Answer: B: Bicarbonate 
Explanation: Due to severe vomiting, there will be hypochloraemic, hyponatremic, hypokalemic, hypomagnesemic metabolic alkalosis, so we have to correct alkalosis by if bicarbonate. SRB edition :5 page: 829