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
In which of the following the serum C3 not persistently low? 
Select and explain. 
A. Poststreptococcal glomerulonepheritis, B. Membranoproliferative glomerulonephritis, C. Lupus nephritis, D. Glomerulonephritjis related to bacterial endocarditis
A: Poststreptococcal glomerulonepheritis
Answer: A: Poststreptococcal glomerulonepheritis 
Explanation: 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)