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: Pathology
Koebner phenomenon is seen in 
Select and explain. 
A. Impetigo, B. Pemphigoid, C. Erythema multiforme, D. Psoriasis
D: Psoriasis
Answer: D: Psoriasis 
Explanation: None