This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
Montelukast is 
Select and explain. 
A. Selective antagonists of leukotrienes receptor, B. Lipooxygenase inhibitor, C. H1 antagonist, D. H3 antagonist
A: Selective antagonists of leukotrienes receptor
Answer: A: Selective antagonists of leukotrienes receptor 
Explanation: Montelukast and zafirlukast is selective antagonists of the CysLT1 receptor for leukotrienes. Competetively inhibit the bronchoconstictor effects of leukotrienes. Basic and clinical pharmacology Katzung 13th edition pg 324