Select the incorrect statement.

• A

  During inspiration intra-pulmonary volume decreases.

• B

  During expiration intra-pulmonary pressure increases.

• C

  Contraction of diaphragm increases the volume of thoracic chamber in the antero-posterior axis.

• D

  Contraction of internal intercostal muscles increases the volume of the thoracic chamber in the dorso-ventral axis.