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1414 Pharmacology

In a case of acute exacerbation of asthma, salbutamol was given and no improvement noticed, intravenous corticosteroids and aminophylline was given and condition improved. What is the mechanism of corticosteroid in acute asthma?

ACorticosteroid increase bronchial responsiveness to salbutamol
BCorticosteroids cause direct bronchodilation when used with xanthines
CCorticosteroids indirectly increase the effect of xanthines on adenosine receptor
DCorticosteroids increase mucociliary clearance.
Pharmacology
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