This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Body composition and Acid base Balance, Subject name: Pediatrics
[{'content': 'Which of the following is not a cause of chloride responsive metabolic alkalosis? \nSelect and explain. \nA. Vomiting, B. Cystic fibrosis, C. Post hypercapnia syndrome, D. Congenital adrenal hyperplasia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Congenital adrenal hyperplasia: causes chloride resistant metabolic alkalosis', 'role': 'assistant'}]