This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
The given below sign is present in 
Select and explain. 
A. Lichen planus, B. Atopic dermatitis, C. Drug eruptions, D. Contact dermatitis
B: Atopic dermatitis
Answer: B: Atopic dermatitis 
Explanation: The above shows the presence of "Dermatographism" where skin blanching is seen whenever it is stroked with a blunt object. This is a classical feature of Atopic dermatitis.