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
Single Drug regimen for Carcinoma Esophagus which shows tumor size decrease of around 15-20% is: 
Select and explain. 
A. Bleomycin, B. Cisplatin, C. Docorubicin, D. Vincristine
B: Cisplatin
Answer: B: Cisplatin 
Explanation: 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.