This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood transfusion, Subject name: Pathology
[{'content': 'Duffy antigen is associated with: \nSelect and explain. \nA. Cluster of Differentiation 123 (CD123), B. Cluster of Differentiation 234 (CD234), C. Cluster of Differentiation 345 (CD345), D. Cluster of Differentiation 456 (CD456)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Duffy antigen/chemokine receptor (DARC), also known as Fy glycoprotein (FY) Associated with CD234 (Cluster of Differentiation 234) Duffy antigen is located on the surface of RBCs. Glycosylated membrane protein and a non-specific receptor for several chemokines. Receptor for the human malarial parasites Plasmodium vivax and Plasmodium knowlesi. Polymorphisms in this gene are the basis of the Duffy blood group system.', 'role': 'assistant'}]