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: Medicine
[{'content': 'Duffy antigen on erythrocytes are receptors for \nSelect and explain. \nA. P. falciparum, B. P. vivax, C. P. ovale, D. P. malariae', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]