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: Pediatrics
[{'content': 'A 1-month old baby present with frequent vomiting and failure to thrive. There are features of moderate dehydration. Blood sodium in 122 mEq/l and potassium is 6.1 mEq/l. The most likely diagnosis is? \nSelect and explain. \nA. Gitelman syndrome, B. Bater syndrome, C. 21-hydroxylase deficiency, D. 11-13 hydroxylase deficiency', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 21 hydroxylase deficiency Blood parameters indicate Hyponatremia and Hyperkalemia in this patient. All conditions other than 21 hydroxylase deficiency present with Hypokalemia.", 'role': 'assistant'}]