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': 'Growth spu occurs - \nSelect and explain. \nA. Just before appearance of axillary hair, B. Just before menarche, C. After 16 years, D. Before thelarche', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Just before menarche", 'role': 'assistant'}]