<prompt> PSGN is -Dense deposit diseaseRapidly progressive glomerulosclerosisNephrotic syndromeNephritic syndrome  <response>: Ans. is d i.e., Nephritic syndrome Causes of Acute Nephritic SyndromeI. Primary GlomerulonephritisII. Sy stemic Disease1. Acute GNi Post-streptococcalii Non-streptococcal1. SLE2. Polyarteritis nodosa3. Wegeners granulomatosis4. Henoch-Schonlein purpura5. Cryoglobulinemia2. Rapidly progressive GN3. Membranoprol iferati ve GN4. Focal GN5. IgA nephropathy 