Asthma can be prevented by–

Correct option is A

Sol. The most effective preventive approach for asthma is avoiding triggers such as dust, smoke, pet dander, cold air, and pollen. Asthma is a chronic respiratory condition where airways become inflamed, leading to breathing difficulty. While medicines manage symptoms, avoiding allergens can reduce frequency and severity of attacks.
Explanation of each option:
· (a) Preventing exposure to allergens – Correct Answer. Allergen avoidance helps prevent asthma attacks and is the first step in asthma management, especially in children and allergic individuals.
· (b) Take vaccine against asthma – No vaccine exists specifically for asthma. However, vaccines for flu or pneumococcus are advised to reduce complications.
· (c) Taking medicines regularly – Helps control and manage asthma but doesn’t prevent its onset. Inhalers and corticosteroids help in long-term control, not prevention.
· (d) None of the above – Incorrect. Prevention is possible by avoiding known allergens and triggers, which reduces new or worsening asthma episodes.