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': 'Which of the following drugs can cause "Churg Strauss syndrome" \nSelect and explain. \nA. Omalizumab, B. Theophylline, C. Montelukast, D. Zileuton', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Montelukast and Zafirlukast are leukotriene receptor antagonists used in bronchial asthma, which can lead to “Churg strauss syndrome” characterized by vasculitis and eosinophilia.', 'role': 'assistant'}]