This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'In which of the following the serum C3 not persistently low? \nSelect and explain. \nA. Poststreptococcal glomerulonepheritis, B. Membranoproliferative glomerulonephritis, C. Lupus nephritis, D. Glomerulonephritjis related to bacterial endocarditis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: SerumC3 levels are persistently low in membranoproliferative GN, lupus nephritis, and glomerulonephritis related to infective endocarditis. Poststreptoccal glomerulonephritis: SerumC3 Levelsaredepressed within2weeksinalmost90%ofcases.However,C3 levelsreturntonormal within6to 8weeks. Persistentlydepressedlevelsaftehisperiodshouldsuggestanothercausesuchas C3 nephriticfactor (membranoprolif-erativeglomerulonephritis)', 'role': 'assistant'}]