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
Koebner phenomenon present in which of the following – 
Select and explain. 
A. Plane warts, B. Pemphigus vulgaris, C. Lupus vulgaris, D. Lichen simplex chronicus
A: Plane warts
Answer: A: Plane warts 
Explanation: None