This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'WHO defines moderate malnutrition as: \nSelect and explain. \nA. Weight-for-age between -3 and -2 z-scores below the median of the WHO child growth standards., B. Weight-for-age between -1 and -2 z-scores below the median of the WHO child growth standards., C. Weight-for-age between -3 and -4 z-scores below the median of the WHO child growth standards., D. Weight-for-age < -3 z-scores below the median of the WHO child growth standards.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Weight-for-age between -3 and -2 z-scores below the median of the WHO child growth standards.Moderate malnutrition according to WHO: weight-for-age between -3 and -2 z-scores below the median of the WHO child growth standards.Severe malnutrition: weight-for-age < -3 z-scores below the median of the WHO child growth standards.', 'role': 'assistant'}]