This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
The epidermal turn over time is 
Select and explain. 
A. 14 days, B. 28 days, C. 40 days, D. None of the above
B: 28 days
Answer: B: 28 days 
Explanation: Epidermal turn over time or skin doubling time includes:- Transit time from basal layer to stratum corneum = 14 days; transit through the stratum corneum/desquamation = 14 days (total = 28 days from basal layer to desquamation. Ref:- Review of Dermatology by Alikhan; pg num:-2