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
[{'content': 'Vitiligo vulvar, best treatment is - \nSelect and explain. \nA. Coaltar, B. PUVA, C. Steroids, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: VITILIGO\xa0\n\nAcquired, an idiopathic disorder characterised by hypomelanosis of skin and hair together with the development of white macules with an absence of melanocytes on microscopy.\n\nTypes:-\n1. Localised - segmental and focal.\n\nSegmental-one/ more macules distributed in dermatomal or quasi-dermatomal pattern.\nFocal-one/more macules distributed in a single area but not in a dermatomal pattern.\n\n2. Generalised\xa0\n\nVitiligo vulgaris- most common.Depigmented macules in symmetrical pattern.\nAcromucosal\nUniversal\n\nTreatment:\n\nVitiligo vulgarities-PUVA (psoralen+UVA).Topical or oral psoralen combined with UV A (320-400nm) irradiation is effective for treating vitiligo.', 'role': 'assistant'}]