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, best treatment is - 
Select and explain. 
A. Coaltar, B. PUVA, C. Steroids, D. All
B: PUVA
Answer: B: PUVA 
Explanation: VITILIGO 

Acquired, an idiopathic disorder characterised by hypomelanosis of skin and hair together with the development of white macules with an absence of melanocytes on microscopy.

Types:-
1. Localised - segmental and focal.

Segmental-one/ more macules distributed in dermatomal or quasi-dermatomal pattern.
Focal-one/more macules distributed in a single area but not in a dermatomal pattern.

2. Generalised 

Vitiligo vulgaris- most common.Depigmented macules in symmetrical pattern.
Acromucosal
Universal

Treatment:

Vitiligo vulgarities-PUVA (psoralen+UVA).Topical or oral psoralen combined with UV A (320-400nm) irradiation is effective for treating vitiligo.