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': 'Infantile atopic dermatitis commonly involves \nSelect and explain. \nA. Flexors, B. Extensors, C. Head & neck, D. Perianal area', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Infantile atopic dermatitis (2 months - 2 years): More commonly involves extensors.\nChildhood atopic dermatitis (2 - 10 years): Commonly involves flexors\nAdolescent atopic dermatitis (> 10 years): Commonly involves flexors, hand & feet.', 'role': 'assistant'}]