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: Social & Preventive Medicine
Beta naphthyl-amines is associated with cancer of: 
Select and explain. 
A. Bladder, B. Oral, C. Liver, D. none of the above
A: Bladder
Answer: A: Bladder 
Explanation: Bladder cancer is known to be associated with aniline industry. Chemicals mentioned as bladder carcinogens are benzidine, auramine, magenta, beta naphthylamines and para amino diphenyl. Ref: Park 21st edition, page: 748.