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': 'An adult presents with oval scaly hypopigmented macule over the chest and the back. The diagnosis is \nSelect and explain. \nA. Pityriasis versicolor, B. Leprosy, C. Lupus vulgaris, D. Lichen Planus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.\nIn Pityriasis versicolor → Lesions occur mostly on chest and Trunks. (Lower limb & hand usually not involved).\nCommonly occurs in young adults. In indeterminate leprosy → lesions are not scaly.\nThey are hypopigmented anaesthetic patches. In lichen planus → the lesions are hyperpigmented', 'role': 'assistant'}]