This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Auto Immune Disorders Introduction, Subject name: Pathology
[{'content': 'Which of the following is not a C-C chemokine? \nSelect and explain. \nA. IL-18, B. MCP-1, C. Eotaxin, D. MIP-1a', 'role': 'user'}, {'content': 'Answer: A \nExplanation: C-C chemokines include monocyte chemoattractant protein (MCP-1, CCL2), eotaxin (CCL11), macrophage inflammatory protein-1a (MIP-1a, CCL3) These generally attract monocytes, eosinophils, basophils, and lymphocytes Less potent as chemoattractant for neutrophils IL-18 (CXCL18) is a type of C-X-C chemokine, secreted by activated macrophages, endothelial cells, and causes activation and chemotaxis of neutrophils.', 'role': 'assistant'}]