This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunomodulator, Subject name: Pharmacology
In Rituximab, -xi- in the center stands for - 
Select and explain. 
A. Unique name, B. Tumor, C. Chimeric, D. Monoclonal antibody
C: Chimeric
Answer: C: Chimeric 
Explanation: Ans. is 'c' i.e., ChimericRituximabSternWhat it Meansri--tu-xi-mabUnique nameTumorsChimmericMonoclonal antibody