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: Gynaecology & Obstetrics
[{'content': 'The sexual development is considered is precocious if there is breast and public hair growth before the age of : \nSelect and explain. \nA. 8 years, B. 9 years, C. 10 years, D. 11 years', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 8 years', 'role': 'assistant'}]