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': 'Precocious puberty in girls is defined by the onset of secondary sexual characteristic before the age of \nSelect and explain. \nA. 5 years, B. 7  years, C. 8  years, D. 9  years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Precocious puberty :\nOnset of secondary sexual characteristic before the age of 8 years in girls and 9 years in boys.', 'role': 'assistant'}]