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
Vitiligo vulvaris, best treatment is : 
Select and explain. 
A. PUVA, B. Steroids, C. Coaltar, D. All
A: PUVA
Answer: A: PUVA 
Explanation: A. ie. PUVA