<prompt> Transitional cell carcinoma bladder caused bySchistosomiasisAscariasisMalariaNone  <response>: Risk factors for transitional cell carcinoma TCC of the 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 Phenacetin 5. Cyclophosphamide therapy 6. Pelvic irradiation 