<prompt> Transitional cell carcinoma of bladder is associated with-SchistosomiasisNaphthylamineSmokingAll  <response>: Ans. is a i.e., Schistosomiasis; b i.e., Naphthylamine c i.e., SmokingRisk factors for transitional cell carcinoma TCC of bladder ?I. Smoking --- 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 -- PhenacetinCyclophosphamide therapyPelvic irradiations 