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: Pathology
[{'content': 'Gene associated with superficial papillary urothelial neoplasm \nSelect and explain. \nA. p53, B. p16, C. p7, D. KRAS', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. p16Chromosome deletions in 9p, which contains the tumor suppressor gene p16, are the only consistent finding in low grade papillary tumors and flat carcinomas in situ. Deletions in 17 p, the site of p53 gene, are often found in invasive bladder cancer.', 'role': 'assistant'}]