This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'The following cell types does not paicipate in repair after brain infarction \nSelect and explain. \nA. Microglia, B. Astrocytes, C. Fibroblasts, D. Endothelium', 'role': 'user'}, {'content': "Answer: C \nExplanation: The greatest factor in functional recovery after brain injury comes from the brain's ability to learn, called neuroplasticity. ... Recent studies have found collagen is extensively distributed throughout the brain and may be essential in protecting the brain against degeneration such as that in Alzheimers. Fibroblast do not play a role Refer robbins 9/e p774", 'role': 'assistant'}]