This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
[{'content': 'Zileuton, a 5-lipooxigenase inhibitor, acts by which of the following mechanisms? \nSelect and explain. \nA. LT C4 synthesis inhibitor, B. D4 synthesis inhibitor, C. LT B4 synthesis inhibitor, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d (All of the above) (Ref. KDT, Pharmacology, 6th ed. 175, 223)ZILEUTON# 5-Lipoxygenase inhibitor and blocks LTC4, LTD4 as well as LTB4 Synthesis# Duration of action - Short 3-4 hrs# Adverse effect - Hepatotoxicity.MONTELEUKAST, ZAFIRLUKAST# Cys LT1 receptor antagonist used in asthma prophylaxis# Side effects:- Eosinophilia, Neuropathy, Churg-Strauss disease', 'role': 'assistant'}]