<prompt> Serum C3 is persistently low in the following except -Post-streptococcal glomerulonephritisMembranoproliferative glomerulonephritisLupus nephritisGlomerulonePhritis related to bacterial endocarditis  <response>: Blood findings: Complement levels in post-streptococcal GN: Transient reduction during the disease Return to normal in 6-8 weeks. Urinary findings: Oliguria Mild proteinuria Hematuriasmoky or cola colored urine Red cell casts or dysmorphic red cells red cells with cellular protrusions or fragmentation Ref: RAM DAS NAYAK EXAM PREPARATORY MANUAL FOR UNDERGRADUATES 2nd ed. pg no: 601 