<prompt> Order of development of secondary sexual characteristic in maleTesticular developmentpubic hairaxillary hairbeardPubic hairtesticular developmentaxillary hair beardTesticular development beardpubic hairaxillary hairAxillary hairbeard pubic hairtesticular development  <response>: 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. 