This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Dermatitis, Subject name: Dental
Exclamation mark hair is seen in 
Select and explain. 
A. Alopecia areata, B. Traction alopecia, C. Trichotillomania, D. Androgen alopecia
A: Alopecia areata
Answer: A: Alopecia areata 
Explanation: Exclamatory mark hair are seen in alopecia areata. ref Harrison20th edition pg 1334