This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'Serum C3 is persistently low in the following except - \nSelect and explain. \nA. Post-streptococcal glomerulonephritis, B. Membranoproliferative glomerulonephritis, C. Lupus nephritis, D. GlomerulonePhritis related to bacterial endocarditis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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 Hematuria(smoky 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', 'role': 'assistant'}]