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': 'While handling a febrile neutropenic patient all are essential except - \nSelect and explain. \nA. Repeated hand washing of hospital person, B. White cell infusion, C. Prophylactic antibiotic, D. Colony stimulating factor for macrophages', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]