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
Which of the following are associated with Bladder cancer 
Select and explain. 
A. Naphthylamines, B. Nickel, C. Arsenic, D. Lead
A: Naphthylamines
Answer: A: Naphthylamines 
Explanation: Now following has been mentioned as possible bladder carcinogens:
b-napthylamines
Benzidine
Paraamino-diphenyl
Auramine
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