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
The tensile strength of the wound starts and increases after 
Select and explain. 
A. Immediately after suturing, B. 3 to 4 days, C. 7-10 days, D. 6 months
B: 3 to 4 days
Answer: B: 3 to 4 days 
Explanation: Wounds do not begin to gain tensile strength from collagen until 5 - 7 days.
Wound achieves around  20 % by 3 weeks,  and around 60 % by four months.
Scar tissue continues to remodel for at least 6 - 12 months after an injury.