Which of the following observations signal
问题:
Which of the following observations signals the onset of puberty in male adolescents
A. Appearance of pubic hair.
B. Appearance of axillary hair.
C. Testicular enlargement.
D. Nocturnal emissions.
Which of the following observations signals the onset of puberty in male adolescents
A. Appearance of pubic hair.
B. Appearance of axillary hair.
C. Testicular enlargement.
D. Nocturnal emissions.