This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Targeted Anticancer Drugs and Immunosuppressants, Subject name: Pharmacology
[{'content': 'Which of the following monoclonal antibodies is a humanized antibody? \nSelect and explain. \nA. Rituximab, B. Palivizumab, C. Infliximab, D. Basiliximab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nomenclature of monoclonal antibodies: * Their name ends with mab. * Before mab the two letters tell the source: - XI means Chimeric - ZU means humanized - U means completely human', 'role': 'assistant'}]