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: Pharmacology
[{'content': 'Filgrastim is used for the treatment of : \nSelect and explain. \nA. Neutropenia, B. Anemia, C. Polycythemia, D. Neutrophilia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Filgrastim (G-CSF) and sargramostim (GM-CSF) are used to prevent or treat chemotherapy-induced neutropenia.\nErythropoietin is used to treat anemia associated with chronic renal failure and cancer chemotherapy.\nOprelvekin (IL-11) is used to prevent and treat thrombocytopenia.', 'role': 'assistant'}]