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
[{'content': 'A child was given leukotriene receptor antagonist for prophylaxis of asthma. The drug is - \nSelect and explain. \nA. Monteleukast, B. Zileuton, C. Nedocromil, D. Verpami I', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Monteleukast o Monteleukast and zafirleucast are cystenyl LT, (cys LT,) receptor antagonists.", 'role': 'assistant'}]