This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'All can cause R.P.G.N. except - \nSelect and explain. \nA. Minimal change glomerulonephrits, B. Poststreptococcal glomerulonephritis, C. Wegener granulomatosis, D. S.L.E.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Minimal change nephropathy Minimal change disease occurs at all ages but accounts for most cases of nephrotic syndrome in children and cannot cause RPGN and about one-quaer of adult cases. It is caused by reversible dysfunction of podocytes. On light microscopy, the glomeruli appear normal , but fusion of podocyte foot processes is observed on electron microscopy. The presentation is with nephrotic syndrome, which typically is severe; it remits . Ref Harrison20th edition pg 297', 'role': 'assistant'}]