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': 'Fibroblast is derived from - \nSelect and explain. \nA. Local mesenchyme, B. Macrophage, C. Endothelium, D. Vessels', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Local mesenchymeFibroblasts are derived from mesenchyme.", 'role': 'assistant'}]