This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'The first sign of pubey in female is \nSelect and explain. \nA. Tanner stage I, B. Tanner stage II, C. Pubic hair, D. Axillary hair', 'role': 'user'}, {'content': "Answer: B \nExplanation: Thelarche is the first sign of pubey in a girl around the age of 10 yearsDefinition:- beginning of secondary (Postnatal) breast development at the onset of pubey in girlsTanner stage 2 breast development.Because of rising level of estradiol.Breast development in a male is termed as gynecomastia, not thelarche(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 926)", 'role': 'assistant'}]