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: Gynaecology & Obstetrics
[{'content': 'Which of the following histologic types of invasive breast cancer has the best prognosis? \nSelect and explain. \nA. Medullary carcinoma, B. Mucinous carcinoma, C. Tubular carcinoma, D. Ductal carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tubular carcinoma has the best prognosis. Medullary and mucinous have intermediate and ductal and lobular the worse prognosis respectively.', 'role': 'assistant'}]