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
A 70 year old patient with history of smoking presents with gross painless
hematuria. Likely diagnosis is 
Select and explain. 
A. Uerter stone, B. Ca. bladder, C. Ca. prostate, D. Bladder stone
B: Ca. bladder
Answer: B: Ca. bladder 
Explanation: History of smoking, old age and gross hematuria it is likely to be bladder Ca.