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
Proliferation of mature fibroblasts occurs in 
Select and explain. 
A. Keloid, B. Hypertrophic scar, C. Both of the above, D. None of the above
A: Keloid
Answer: A: Keloid 
Explanation: Hypertrophic scar - Proliferation of mature fibroblasts keloid - Proliferation of immature fibroblasts.