This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitiligo & Other Disorders of Hypopigmentation, Subject name: Skin
[{'content': 'An adult presents with oval scaly hypopigmented macule over the chest and the back. The diagnosis is: \nSelect and explain. \nA. Leprosy, B. Lupus vulgaris, C. Pityriasis versicolor, D. Lichen Planus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' Pityriasis Versicolor Both Pityriasis versicolor and Pityriasis Alba causes scaly hypopigmented macules but the lesions of Pityriasis alba occurs on cheek & face and common age of presentation is young children. In Pityriasis versicolor - Lesions occur mostly on shoulder's and Trunks. (Lower limb & hand usually not involved). Commonly occurs in young adults.In indeterminate leprosy - lesions are not scaly. They are hypopigmented anaesthetic patches. In lichen planus - the lesions are hyperpigmented", 'role': 'assistant'}]