This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluids and Electrolyte Imbalance, Subject name: Medicine
[{'content': 'T.T.K.G >8 is seen in all except: \nSelect and explain. \nA. Diabetes mellitus, B. Acute glomerulonephritis, C. Adrenocoical insufficiency, D. Cushing syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Transtubular potassium gradient > 8 is associated with hyperkalemia. Choices 1, 2, 3 lead to hyperkalemia. Choices 1 and 2 lead to kidney damage. Choice 3 due to aldosterone deficiency leads to potassium excess due to inability to loose potassium the collecting duct. Cushing syndrome has excess of coisol, which stimulates the mineralocoicoid receptors to cause hypokalemic metabolic alkalosis.', 'role': 'assistant'}]