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
Growth phase of hair is- 
Select and explain. 
A. Anagen, B. Metagen, C. Telogen, D. None
A: Anagen
Answer: A: Anagen 
Explanation: Anagen phase- active growth phase - 2-10years duration Catagen phase- regression phase- 3 weeks duration Telogen phase- resting phase- 3 months duration Ref Harrison20th edition pg 1234