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': 'A 3-year-old child has eczematous dermatitis on extensor surfaces. His mother has a history of Bronchial asthma. Diagnosis should be – \nSelect and explain. \nA. Atopic dermatitis, B. Contact dermatitis, C. Seborrhic dermatitis, D. Infantile eczematous dermatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In this question:-\n\n\nThe child is 3 years old\nHistory of Asthma in mother\nExtensor involvement\n\n\n\nFirst two points suggest the diagnosis of atopic dermatitis (childhood pattern).\nAbout third point (extensor involvement) :-\n\n"Though childhood atopic dermatitis mainly involves flexural parts, less commonly extensor surfaces may also be\xa0involved".\n\nFurther, you can easily rule out other three options:-\n\nContact dermatitis\n\nThe family history of asthma is not important.\nNo history of contact to an allergen.\n\nSeborrheic dermatitis\n\nOccurs in adults and less frequently in infants but not in children.\n\nInfantile eczematous dermatitis\n\nOccurs in Infant.', 'role': 'assistant'}]