This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Subject name: Pediatrics
[{'content': 'Postnatally when is the growth velocity maximum? \nSelect and explain. \nA. In the first year of life, B. In the second year of life, C. In the seventh year of life, D. In adolescence', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Postnatally there are 2 periods of accelerated growth: first year of life and growth spu during pubey.', 'role': 'assistant'}]