Which of the following statement is incorrect w.r.t the mechanism of breathing ?

Options

A. The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and atmosphere.
B. Inspiration is initiated by the concentration of diaphragm which increases the volume of thoracici chamber.
C. The contraction of external intercostal muscles lifts up the ribs and sternum causing decrease in the volume of thoracic chamber.
D. On an average, a healthy human breathes 12-16 times/ min.

Answer

C