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: Surgery
[{'content': 'Best prognosis of following: \nSelect and explain. \nA. <1 cm Size, Node -ve, ER/PR +ve, Her 2 Negative, B. <1 cm Size, Node -ve, ER/PR -ve, Her 2 Positive, C. <2 cm Size, Node -ve, ER/PR +ve, Her 2 Negative, D. <2 cm Size, Node -ve, ER/PR -ve, Her 2 positive', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) <1cm Size, Node -ve, ER/PR +ve, Her 2 Negative(Ref. Bailey and Love 27th edition Page 872)* ER/PR Positive is good prognosis* Her 2 positive carries high virulence of the tumor', 'role': 'assistant'}]