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': 'Lanuago hair appeas at : \nSelect and explain. \nA. 4 Months, B. 5 months, C. 6 months, D. 7 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 4 months', 'role': 'assistant'}]