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': 'Woods lamp used in diagnosis of : \nSelect and explain. \nA. P. versicolor, B. Vitiligo, C. Porphyria, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. All, A i.e. P. Versicolor; B i.e Vitiligo; C i.e. Porphyria', 'role': 'assistant'}]