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': 'Drug of choice for neutropenia due to cancer chemotherapy is : \nSelect and explain. \nA. Vitamin B–12, B. IL–11, C. Filgrastim, D. Erythropoietin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]