Read the following statements regarding disorders of the respiratory system: (A) Asthma is a difficulty in breathing causing wheezing due to the inflammation of alveoli. (B) Emphysema is a chronic disorder in which alveolar walls are damaged, leading to a decrease in the respiratory surface. (C) Cigarette smoking is one of the major causes of occupational respiratory disorders. (D) Long exposure to dust in stone-brea

Step-by-step solution

Statement (A) is incorrect because asthma is a difficulty in breathing causing wheezing due to the inflammation of bronchi and bronchioles, not alveoli. Statement (B) is correct. Emphysema is a chronic disorder in which alveolar walls are damaged, leading to a decrease in the respiratory surface. A major cause of this is cigarette smoking. Statement (C) is incorrect because cigarette smoking is a major cause of emphysema, whereas occupational respiratory disorders are caused by inhalation of dust or particles in ce