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': 'All are true about gleason’s score except \nSelect and explain. \nA. Used for grading prostatic ca, B. Maximum score is 10, C. Minimum score is 2, D. It is the most important prognostic factor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Stage of Ca is the most important prognostic factor.', 'role': 'assistant'}]