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: Skin
[{'content': 'True about pitryiasis alba : \nSelect and explain. \nA. No active treatment required, B. Common in elderly, C. Variant of vitiligo, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. No active treatment required Pityriasis alba characteristically presents with recurrent scaly hypopigmented macules on cheeks and face of young childrenQ. It requires no active treatment (i.e. assurance only).', 'role': 'assistant'}]