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': 'The weight of the child at 3 years is usually times the birth weight – \nSelect and explain. \nA. 3, B. 4, C. 5, D. 7', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]