Correct Answer: A

Rationale: Salbutamol (Albuterol) is a short-acting beta-2 adrenergic receptor agonist (SAB
A) that acts on bronchial smooth muscles to induce relaxation, resulting in bronchodilation. The rapid improvement in breathing and resolution of wheezing within 30 minutes of inhalation corresponds with its expected pharmacodynamic profile. Unlike corticosteroids, which reduce airway inflammation over time, or muscarinic antagonists, which act slower, Salbutamol provides immediate relief of bronchospasm by stimulating cyclic AMP production. This makes it the drug of choice for acute asthma attacks and exercise-induced bronchoconstriction, confirming its classification as a beta-2 adrenergic agonist.

Correct Answer:

Rationale:

Correct Answer:

Rationale:

Correct Answer:

Rationale:

Correct Answer:

Rationale: