This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunomodulators, Subject name: Pharmacology
The only FDA approved radioactive antibody that can be used for treatment of lymphoma: 
Select and explain. 
A. Trastuzumab, B. Ibritumomab, C. Rituximab, D. Imatinib
B: Ibritumomab
Answer: B: Ibritumomab 
Explanation: Ibritumomab is a TNF a inhibitor is a newly approved drug by the FDA for treating both Hodgkin and non-Hodgkin lymphomas. It is a monoclonal antibody radioimmunotherapy treatment for relapsed or refractory, low grade or transformed B cell non-Hodgkin's lymphoma, a lymphoproliferative disorder. Other given drugs are also TNF a inhibitors mostly used in rheumatoid ahritis, ankylosing spondylosis, chron's disease, etc REF KD tripathi 8th ed