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': 'Ca urinary bladder commonly presents as ? \nSelect and explain. \nA. Haematuria, B. Frequency, C. Dysuria, D. Abdominal lump', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' ie haematuria", 'role': 'assistant'}]