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': '"Head light" sign is seen in \nSelect and explain. \nA. Tinea capitis, B. Dermatofibroma, C. Atopic dermatitis, D. Alopecia areata', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Perioral, periorbital and perinasal pallour seen in Atopic dermatitis is called as "Head light" sign.', 'role': 'assistant'}]