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: Surgery
Fibroblast in healing wound derived from - 
Select and explain. 
A. Local mesenchyme, B. Epithelium, C. Endothelium, D. Vascular fibrosis
A: Local mesenchyme
Answer: A: Local mesenchyme 
Explanation: None