This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Low complement levels seen in \nSelect and explain. \nA. PSGN, B. MPGN, C. Infective endocarditis, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref Harrison 16/e p680 normal complement levelssuggest renal diseases such as immune complex disease, idiopathic rapidly progressive GN, and immunoglobulin G (IgG) or immunoglobulin A (IgA) nephropathy. Low C3 levels are found in almost all patients with acute poststreptococcal nephritis; C4 levelsmay be slightly low', 'role': 'assistant'}]