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: Dental
Woods lamp used in diagnosis of – a) P. versicolorb) Vitiligoc) Porphyriad) Psoriasise) Lichen planus 
Select and explain. 
A. abc, B. bc, C. acd, D. bcd
A: abc
Answer: A: abc 
Explanation: Wood's lamp is used in Tinea capitis, Erythrasma, vitiligo, albinism, Leprosy, Tuberous sclerosis, Pseudomonas infection, Porphyria, Tinea versicolor.