This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is a leukotriene antagonist? 
Select and explain. 
A. Montelukast, B. Zileuton, C. Omahzumab, D. Nedocromil
A: Montelukast
Answer: A: Montelukast 
Explanation: Out of all the given options, Montelukast is a leukotriene antagonist. Ref: K D Tripathi Textbook of Pharmacology, 5th Edition, Page 205; Modern Pharmacology With Clinical Applications By Charles R. Craig, Robe E. Stitzel, Pages 465-67