This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glomerulonephritis, Subject name: Pathology
[{'content': 'All of the following about xanthogranulomatous pyelonephritis are true except: \nSelect and explain. \nA. On cut section yellowish nodules are seen, B. Associated with tuberculosis., C. Foam cells are seen, D. Giant cells are seen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Xanthogranulomatous pyelonephritis Chronic destructive granulomatous process of renal parenchyma Associated with Long-term urinary tract obstruction Infection E. coli Proteus mirabilis Pseudomonas Streptococcus faecalis Klebsiella Not associated with Tuberculosis', 'role': 'assistant'}]