Which of the Following Characteristics Apply to Normal Tracheal Breath

Multiple Choice

Which of the following characteristics apply to normal tracheal breath sounds?
1) Loud
2) Low pitched
3) High pitched
4) Fairly equal inspiratory and expiratory components

A) 1 and 3
B) 2 and 4
C) 1, 2, and 4
D) 2, 3, and 4