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': "Perioral pallor and Dennie's line are seen in: \nSelect and explain. \nA. Atopic dermatitis, B. Chronic actinic dermatitis, C. Blood dyscrasia, D. Perioral contact dermatitis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Atopic dermatitis', 'role': 'assistant'}]