Which of the following medications is an inhaled agent used for long-term prophylaxis of asthma?

Choice A rationale Beclomethasone (QVAR) is an inhaled corticosteroid used for long-term prophylaxis of asthma. It works by reducing inflammation in the airways, preventing asthma attacks and improving lung function. Choice B rationale Metoprolol is a beta-adrenergic blocker used for treating hypertension and certain heart conditions. It is not used for asthma management. Choice C rationale Phenytoin is an antiepileptic medication used to control seizures. It does not have a role in asthma management. Choice D rationale Furosemide is a loop diuretic used to treat conditions like edema and hypertension by promoting the excretion of excess fluid. It is not indicated for asthma management.