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': 'all 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: As discussed in text ,xanthogranulomatous pyelonephritis is associated with E.coli Proteus metabolism, pseudomonas, streptococcal faecalis, and klebshiella Refer robbins 8/943', 'role': 'assistant'}]