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
[{'content': 'Skin doubling time is \nSelect and explain. \nA. 2 weeks, B. 4 weeks, C. 6 weeks, D. 8 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Skin doubling time is 3_4 weeks Ref Harrison20th edition pg 1208', 'role': 'assistant'}]