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: Pathology
[{'content': 'Chemotherapy can be successful during treatment of: \nSelect and explain. \nA. Anneloblastoma, B. Leukemia, C. Fibrosarcoma, D. Basal cell carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]