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
First sign of pubertal development in female is – 
Select and explain. 
A. Breast enlargement, B. Onset of mesturation, C. Enlargement of pubic hair, D. Maximum growth velocity
A: Breast enlargement
Answer: A: Breast enlargement 
Explanation: None