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: Surgery
It is true of carcinoma of the urinary bladder thata) It usually occurs in childhoodb) Occurs more often in aniline dye workersc) It is located most frequently in the trigoned) Papillary formation is rare 
Select and explain. 
A. bc, B. c, C. ac, D. ad
A: bc
Answer: A: bc 
Explanation: None