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': 'Sargramostim is a \nSelect and explain. \nA. GM - CSF, B. G - CSF, C. IL - 11 analogue, D. Erythropoietin analogue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sargramostim: GM - CSF analogue.\nFilagastrim: G - CSF analogue.', 'role': 'assistant'}]