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
What is true about carcinoma bladder ? 
Select and explain. 
A. Common in smokers, B. Commoner in females than that in males, C. Mostly adenocarcinoma, D. Pain in suprapubic region is the first symptom
A: Common in smokers
Answer: A: Common in smokers 
Explanation: Ans. is 'a' i.e., Common in smokers Bladder cancer is 2.5 times more common in men than women.