Pressurized metered dose inhalers are used for administratio…

Pressurized metered dose inhalers are used for administration of :                    1.  Bronchodilators and anti-inflammatory agents                    2.  Bronchodilators and anticholinergics                    3.  Bronchodilators, anticholinergics, and anti-inflammatory agents                    4.  Bronchodilators, anticholinergics, anti-inflammatory and corticosteroids