This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous disorders, Subject name: Dental
In which of the following, Koebner phenomenon is NOT seen - 
Select and explain. 
A. Lichen planus, B. psoriasis, C. lichen nitidus, D. Lichen simplex chronicus
D: Lichen simplex chronicus
Answer: D: Lichen simplex chronicus 
Explanation: koebners phenomenon is seen in lichen planus,psoriasis, lichen nitidus,vitiligo IADVL textbook of dermatology, page 107