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: Microbiology
[{'content': 'After splenectomy, the most common infection: \nSelect and explain. \nA. Pneumococci, B. E. coli, C. Klebsiella, D. Streptococcus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Splenectomy increases the risk of following infections:\n\nBacterial:\nPneumococcal\nH. influenzae\nSome Gram -ve enteric organism\nParasitic – Babesia\nViral – No ↑ in risk of viral infection', 'role': 'assistant'}]