This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': 'Single Drug regimen for Carcinoma Esophagus which shows tumor size decrease of around 15-20% is: \nSelect and explain. \nA. Bleomycin, B. Cisplatin, C. Docorubicin, D. Vincristine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) CisplatinRef: Sabiston 20th Edition, Page 1077* Cisplatin based chemotherapy has been used in those days as single drug regimen* The survival benefit of chemotherapy persisted at the updated median follow-up duration of 6 years, with 5-year survival rates of 23% with chemotherapy plus surgery and 17% with surgery alone.', 'role': 'assistant'}]