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
Main cell responsible for scar contraction is: 
Select and explain. 
A. Myofibroblast, B. Fibroblast, C. Epithelial cell, D. Elastin
A: Myofibroblast
Answer: A: Myofibroblast 
Explanation: None