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
Fibroblast is derived from - 
Select and explain. 
A. Local mesenchyme, B. Macrophage, C. Endothelium, D. Vessels
A: Local mesenchyme
Answer: A: Local mesenchyme 
Explanation: Ans. is 'a' i.e., Local mesenchymeFibroblasts are derived from mesenchyme.