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
Vitiligo vulvar is the best treatment is – 
Select and explain. 
A. PUVA, B. Steroids, C. Coaltar, D. All
A: PUVA
Answer: A: PUVA 
Explanation: Photochemotherapy with psoralens with UVA exposure (PUVA) forms the mainstay of therapy in vitiligo".
"Despite the development in phototherapy, PUVA and PUVA SOL still remain the mainstay of therapy".