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: Skin
[{'content': "Koebner's phenomenon seen in ? \nSelect and explain. \nA. Psoriasis, B. Lichen nitidus, C. Vitiligo, D. All the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., All the above See explanation- 2 of session- 1 of Skin of All India 2014-15 pattern of this book.", 'role': 'assistant'}]