Order of development of secondary sexual characteristic in male –: (A) Testicular development–pubic hair–axillary hair–beard, (B) Pubic hair–testicular development–axillary hair – beard, (C) Testicular development –beard–pubic hair–axillary hair, (D) Axillary hair–beard –pubic hair–testicular development
Answer is A. In boys, the first visible sign of puberty and the hallmark of SMR 2 is testicular enlargement.
The sequence of development of secondary sexual characteristic in boys is -

Testicular enlargement —> Penis enlargement > Pubic hair growth --> Peak growth velocity —> Axillary hair —> facial hair.