This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glomerular Diseases, Subject name: Medicine
[{'content': 'Most common cause of glomerulonephritis? \nSelect and explain. \nA. P.S.G.N, B. Diabetes mellitus, C. Autosomal dominant Polycystic kidney disease, D. Crescentric Glomerulonephritis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) P.S.G.NRef: Harrison 19th ed. /1837* Acute glomerulonephritis (GN) comprises a specific set of renal diseases in which an immunologic mechanism triggers inflammation and proliferation of glomerular tissue that can result in damage to the basement membrane, mesangium, or capillary endothelium.* Acute post-streptococcal glomerulonephritis (PSGN) is the archetype of acute GN. Acute nephritic syndrome is the most serious and potentially devastating form of the various renal syndromes.* Most often, the patient is a boy, aged 2-14 years, who suddenly develops puffiness of the eyelids and facial edema in the setting of a post-streptococcal infection. The urine is dark and scanty, and the blood pressure may be elevate* Rapidly progressive glomerulonephritis (RPGN) is defined as any glomerular disease characterized by extensive crescents (usually >50%) as the principal histologic finding and by a rapid loss of renal function (usually a 50% decline in the glomerular filtration rate within 3 mo) as the clinical correlate.', 'role': 'assistant'}]