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
[{'content': 'Gemtuzumab ozogamycin is a monoclonal antibody against \nSelect and explain. \nA. CD 30, B. CD 33, C. CD 45, D. CD 79a', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is a monoclonal antibody against CD33, used for CD33+ve AML.', 'role': 'assistant'}]