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
Postnatally when is the growth velocity maximum? 
Select and explain. 
A. In the first year of life, B. In the second year of life, C. In the seventh year of life, D. In adolescence
A: In the first year of life
Answer: A: In the first year of life 
Explanation: Postnatally there are 2 periods of accelerated growth: first year of life and growth spu during pubey.