This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'Most important prognostic factor in Ca. Breast. \nSelect and explain. \nA. Lymph Node status, B. Tumor Size, C. Progesterone receptor status, D. Stage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Lymph Node status(Ref: Ref: Robbins 9th/pg 1064 Complete review of pathology 2nd ed/ pg 656)Axillary LN status is the most important prognostic indicator in breast ca', 'role': 'assistant'}]