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': 'Weight gain in the second year of life is – \nSelect and explain. \nA. 1 kg, B. 2 kg, C. 3 kg, D. 4 kg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]