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 drugs can cause "Churg Strauss syndrome" 
Select and explain. 
A. Omalizumab, B. Theophylline, C. Montelukast, D. Zileuton
C: Montelukast
Answer: C: Montelukast 
Explanation: Montelukast and Zafirlukast are leukotriene receptor antagonists used in bronchial asthma, which can lead to “Churg strauss syndrome” characterized by vasculitis and eosinophilia.