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: Pathology
[{'content': 'The following cell types do not participate in repair after brain infarction - \nSelect and explain. \nA. Microglia, B. Astrocytes, C. Fibroblasts, D. Endothelium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Fibroblasts are involved in wound healing, outside the CNS.', 'role': 'assistant'}]