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': 'A 5 year boy has multiple asymptomatic oval and circular faintly hypopigmented macules with fine scaling on his face. The most probable cilinical diagnosis is – \nSelect and explain. \nA. Ptyriasis versicolor, B. Indeterminate leprosy, C. Pityriasis alba, D. Acrofacial vitiligo', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]