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': 'Anagen phase of the hair indicates- \nSelect and explain. \nA. The phase of activity and growth, B. The phase of transition, C. The phase of resting, D. The phase of degeneration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anagen phase- active growth phase-70-80% of hairs will be in anagen phase.last for 2-10years Catagen phase- regression phase- lasts for 1-3 weeks Telogen phase- resting phase- lasts for 3months Reference Harrison20th edition pg 1230', 'role': 'assistant'}]