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': 'Which histologic variety of Breast carcinoma is associated with best prognosis ? \nSelect and explain. \nA. Medullary, B. Colloid, C. Lobular, D. Tubular', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tubular and mucinous type of breast carcinomas are least aggressive cancers and carries best prognosis. Infiltrating and pure medullary carcinomas have intermediate outcome. Infiltrating ductal carcinomas (NOS) is the most common form of breast carcinoma and carries worst outcome.', 'role': 'assistant'}]