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: Unknown
The first visible sign of puberty in boys - 
Select and explain. 
A. Enlargement of penis, B. Enlargement of testes, C. Appearance of pubic hair, D. Appearance of axillary hair
B: Enlargement of testes
Answer: B: Enlargement of testes 
Explanation: Ans. is 'b' i.e., Enlargement of testes o In girls, the first visible sign of puberty is the appearance of breast buds (Thelarche), between 8-12 years of age. In boys the first visible sign of puberty is testicular enlargement, beginning as early as 9 1/2 yr