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
All are TNF–α antagonists used in rheumatoid arthritis except : 
Select and explain. 
A. Ifosfamide, B. Infliximab, C. Etanercept, D. Adalimumab
A: Ifosfamide
Answer: A: Ifosfamide 
Explanation: None