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 this device used by health workers to assess nutritional status of under-5 children? \nSelect and explain. \nA. Harpenden callipers, B. Shakir's tape, C. Orchidometer, D. Infantometer", 'role': 'user'}, {'content': "Answer: B \nExplanation: This device used by health workers to assess nutritional status of under-5 children - Shakir's tape Used to measure mid upper arm circumference (MUAC) Red zone- severe malnutrition Yellow zone- mild to moderate malnutrition Green zone- normal", 'role': 'assistant'}]