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': 'Not a carcinogen for bladder cancer? \nSelect and explain. \nA. Benzidine, B. Isopropyl alcohol, C. Acrolein, D. Phenacetin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Isopropyl alcohol Risk factors for transitional cell carcinoma (TCC) of bladder ? Smoking -4 Major etiological factor. Occupational exposure to chemicals - Nephthylamine benzidine, aniline dyes, acrolein. Schistosoma haematobium (Bilharziasis)- It is a risk factor for both TCC & SCC. Drugs --> Phenacetin Cyclophosphamide therapy Pelvic irradiations", 'role': 'assistant'}]