Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) By the contraction in which of the following muscle, the volume of thoracic chamber increases the antero-posterior axis? - Sarthaks eConnect

By the contraction in which of the following muscle, the volume of thoracic chamber increases the antero-posterior axis?

Diaphragm muscles

Abdominal muscles

Diaphragm muscles and EICM

External intercoastal muscles