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 of the following is given to treat thrombocytopenia secondary to anti-cancer therapy and is known to stimulate progenitor megakaryocytes \nSelect and explain. \nA. Filgrastim, B. Oprelvekin, C. Erythropoietin, D. Anagrelide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Oprelvekin", 'role': 'assistant'}]