Leukotriene receptor antagonist used for bronchial asthma: (A) Zafirkulast, (B) Zileuton, (C) Cromolyn Sodium, (D) Aminophylline
Answer is A. Refer KDT 6 /e p 222 Montelukast, zafirlukast and idalukast are Cys-LT, receptor antagonist Zileuton inhibits the production if Leukotriene by inhibiting the enzyme 5-lipoxygenase