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: Medicine
[{'content': 'Which neo-adjuvant chemotherapy is used in Esophageal carcinoma \nSelect and explain. \nA. Cisplatin, B. Cyclophosphamide, C. Doxorubicin, D. Methotrexate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Cisplatin): Chemotherapy for esophageal cancer has improved considerably with the advent of regimens containing Cisplatin. - Bailey The best responses are seen in Squamous cell carcinomas.', 'role': 'assistant'}]