<prompt> Which of the following are suspected carcinogens for bladder carcinoma?PhenacitinTobaccoAniline dyeAll the above  <response>: Ans. is d i.e., All the above Risk factors for transitional cell carcinoma TCC of bladder -1. Smoking - Major etiological factor.2. Occupational exposure to chemicals - Nephthylamine benzidine, aniline dyes, acrolein.3. Schistosoma haematobium Bilharziasis - It is a risk factor for both TCC SCC.4. Drugs - Phenacetin5. Cyclophosphamide therapy6. Pelvic irradiations 