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
[{'content': "Hypochloremia, hypokalemia and alkalosis are seen in? \nSelect and explain. \nA. Congenital hyperophic pyloric stenosis, B. Hirschsprung's disease., C. Esophageal atresia, D. Jejunal atresia", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e. Congenital hyperophic pyloric stenosis Biochemical abnormality in congenital hyperophic pyloric stenosis is a regular feature of AIIMS and AI examinations it has been repeated several times. The biochemical abnormalities seen are: ( I ) Hypokalemia (3) Alkalosis and (2) Hypochloremia (4) Paradoxical aciduria", 'role': 'assistant'}]