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
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 – 
Select and explain. 
A. Ptyriasis versicolor, B. Indeterminate leprosy, C. Pityriasis alba, D. Acrofacial vitiligo
C: Pityriasis alba
Answer: C: Pityriasis alba 
Explanation: None