<prompt> A 1-month old baby present with frequent vomiting and failure to thrive. There are features of moderate dehydration. Blood sodium in 122 mEql and potassium is 6.1 mEql. The most likely diagnosis is?Gitelman syndromeBater syndrome21-hydroxylase deficiency11-13 hydroxylase deficiency  <response>: 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. 