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
Following is a type of physical urticaria – 
Select and explain. 
A. Dermographism, B. Urticaria pigmenthosa, C. Urticaria vasculitis, D. Auto-immune urticaria
A: Dermographism
Answer: A: Dermographism 
Explanation: None