This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Dental
Woods lamp used in diagnosis of 
Select and explain. 
A. Pityriasis versicolor, B. Vitiligo, C. Porphyria, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Pityriasis versicolor- golden yellow fluorescence tinea capitis grey patch type - greenish yellow fluorescnece porphyria- reddish fluorescence of urine and teeth erythrasma - coral red fluorescence pseudomonas - greenish fluorescence iadvl textbook of dermatology page 94