This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neutrophilic Dermatoses, Subject name: Skin
A child scratches his hand with a pen. A red wheel appears which persists for 30 minutes. What would be the diagnosis? 
Select and explain. 
A. Contact urticaria, B. Dermographism, C. Pressure urticaria, D. Atopy
B: Dermographism
Answer: B: Dermographism 
Explanation: Ans. b. DermographismWhite dermographism is seen in atopic dermatitisDermographism is seen in urticaria