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': 'EMA - CO regimen for treatment of choriocarcinoma includes all except \nSelect and explain. \nA. Etoposide, B. Cisplatin, C. Methotrexate, D. Actinomycin - D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: EMACO\xa0⇒\n\nEtoposide\nMethotrexate\nActinomycin\nCyclophosphamide\nOncovin.', 'role': 'assistant'}]