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: Medicine
[{'content': "Causes of metabolic alkalosis include all the following except - \nSelect and explain. \nA. Mineralocorticoid deficiency, B. Bartter's syndrome, C. Thiazide diuretic therapy, D. Recurrent vomiting", 'role': 'user'}, {'content': "Answer: A \nExplanation: Mineralo corticoid deficiency is a cause normal anion gap metabolic acidosis-\nRecurrent vomiting\n\nGastro intestinal loss of H+ from repeated vomitings results in retention of HCO3- and hence metabolic alkalosis\n\nThiazides\n\nThiazides are diuretics which acutely diminish the ECF volume without altering the total body bicarbonate\nThe serum Bicarbonate concentration, therefore, increases and hence metabolic alkalosis\n\nBartter's Syndrome\n\nBartter's syndrome is characterized pathologically by impaired Cl- reabsorption in the thick ascending loop of Henle and clinically by a triad of\nMetabolic alkalosis\nHypokalemia\nNormal or low B.P.", 'role': 'assistant'}]