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': 'Appearance of Breast bud is known as: March 2013 \nSelect and explain. \nA. Menarche, B. Thelarche, C. Pubarche, D. Anarche', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Thelarche Thelarche is the onset of secondary (postnatal) breast development, usually occurring at the beginning of pubey in girls.', 'role': 'assistant'}]