This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
[{'content': 'Which of these is the most impoant prognostic factor in ALL? \nSelect and explain. \nA. Hyperploidy, B. Total leucocyte count greater than 50,000, C. Age, D. Response to steroids', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Responds to steroids is the most consistent marker in the patients of ALL. (ref Robbins 9th/590-593)', 'role': 'assistant'}]