Match the disorder given in Column-I with the feature most closely related to the disorder in Column-II and select the correct match from the codes given:
| Column-I | Column-II | ||
| A. | Asthma | P. | Inflammation of bronchi and bronchioles |
| B. | Emphysema | Q. | Damage to alveolar walls |
| C. | Occupation lung disease | R. | Pulmonary fibrosis |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | P | R |
| 3. | Q | R | P |
| 4. | R | Q | P |
Asthma may be attributed to?
1. allergic reaction of the mast cells in the lungs
2. inflammation of the trachea
3. accumulation of fluid in the lungs
4. bacterial infection of the lungs