This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Best prognosis amongst the following histological variants of breast carcinoma is seen with - \nSelect and explain. \nA. Intraductal, B. Colloid (mucinous), C. Lobular, D. Medullary', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]