D. Choose the letter of the best answer.
1. Which is NOT a change observed in a boy's body during puberty?
A. development of voice
C. broadening of shoulders
B. development of breast
D. growth of hair in the armpit
2. Which is NOT a change observed in a girl's body?
A. broadening of hips
C. development of muscles
B. development of breasts
D. occurrence of menstruation
3. Which of the following changes in puberty does not occur in males?
A. enlargement of sex organs
C. pubic hair growth
B. growth spuris
D. hips become round and wide
4. How many days does a normal menstrual cycle occur?
A. 7 days
C. 21 days
B. 14 days
D. 28 day​