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
[{'content': 'Most common tumor of urinary bladder is ? \nSelect and explain. \nA. Sq. cell carcinoma, B. Adeno carcinoma, C. Transitional carcinoma, D. Str. squamous carcinoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is 'c' i.e. Transitional cell carcinoma There are 3 common histological types of bladder cancer a) Transitional (urothelial) cell ca -- 90% b) Squamous cell ca -- 5-10% c) Adenocarcinoma -- 2%", 'role': 'assistant'}]