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: Pathology
[{'content': 'Most consistent and persistent feature of Ca Bladder \nSelect and explain. \nA. Frequency, B. Dysuria, C. Lump, D. Hematuria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hematuria is the most consistent and Persistent feature of Ca Bladder.', 'role': 'assistant'}]