This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Maximum growth spurt in boys occurs at: \nSelect and explain. \nA. 8-10 years, B. 10-11 years, C. 12-13 years, D. 14-15 years', 'role': 'user'}, {'content': "Answer: D \nExplanation: d. 14-15 years(Ref: Nelson's 20/e p 84-89, Ghai 8/e p 13-14)Height velocity curves for males (solid line) and females (dashed line) showing maximum growth velocity in:Boys at 14-15 yrsGirls at 11-13 yrs", 'role': 'assistant'}]