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: Pediatrics
[{'content': 'Deficit in weight for height in a 3 years old child indicates – \nSelect and explain. \nA. Acute malnutrition, B. Chronic malnutrition, C. Concomittant acute and chronic, D. Under weight', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]