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
[{'content': 'In Rituximab, -xi- in the center stands for - \nSelect and explain. \nA. Unique name, B. Tumor, C. Chimeric, D. Monoclonal antibody', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., ChimericRituximabSternWhat it Meansri--tu-xi-mabUnique nameTumorsChimmericMonoclonal antibody", 'role': 'assistant'}]