Replacement of cells of skin takes place in
Our skin cells constantly shed and are renewed. The skin is the body's outer covering and protection and is exposed to injuries and pollution. So, there is a quick turnover of about 1-2 weeks where the skin cells are replaced. So, when we get superficial injuries, it generally takes 1-2 weeks time to be fine.
Thus, the correct answer is option (C), '1-2 weeks'.