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: Microbiology
Wood's Lamp used in 
Select and explain. 
A. Tinea pedis, B. Pityriasis versicolor, C. Sporotrichosis, D. All of the above
B: Pityriasis versicolor
Answer: B: Pityriasis versicolor 
Explanation: Wood’s lamp is a device that detects fluorescence structures which gives different color.
In fair skin individuals Wood's Lamp detects Vitiligo (and other depigmentations) even when it is not visible to the eye under normal light conditions.