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
Anti-IgE used in asthma is: 
Select and explain. 
A. Trastuzumab, B. Epratuzumab, C. Toclizumab, D. Omalizumab
D: Omalizumab
Answer: D: Omalizumab 
Explanation: Omalizumab