This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Alopecia, Subject name: Skin
Exclamation mark hairs are seen in: 
Select and explain. 
A. Syphilis, B. Alopecia areata, C. Psoriasis, D. Dermatophytosis
B: Alopecia areata
Answer: B: Alopecia areata 
Explanation: Ans is 'b' i.e, Alopecia areata