This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malnutrition, Subject name: Pediatrics
[{'content': 'What is the abnormality shown in the hairs of a child with severe malnutrition? \nSelect and explain. \nA. Light dark sign, B. Flag sign, C. Hair sign, D. Colour sign', 'role': 'user'}, {'content': "Answer: B \nExplanation: Alternate bands of pigmented & hypopigmented hairs seen in a child with malnutrition - 'Flag sign'.", 'role': 'assistant'}]