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
Woods lamp used in diagnosis of : 
Select and explain. 
A. P. versicolor, B. Vitiligo, C. Porphyria, D. All
D: All
Answer: D: All 
Explanation: D i.e. All, A i.e. P. Versicolor; B i.e Vitiligo; C i.e. Porphyria