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': 'Commonest skin infection in children is - \nSelect and explain. \nA. Scabies, B. Impetigo contagiosa, C. Molluscum contagiosa, D. Was', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Impetigo contagiosa', 'role': 'assistant'}]