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: Surgery
[{'content': 'Which is the commonest Post splenectomy infection? \nSelect and explain. \nA. Streptococcus pyogenes, B. Staphylococcus aureus, C. Streptococcus Pneumoniae, D. Pseudomonas aeruginosa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans is c ie. Streptococcus Streptococcus pneumoniae is the most common inf. in post splenectomy patient. * Schwaz 9/e writes -"The most common causal organism, accounting for as many as 50 to 90% of all OPSI * cases, remains pneumococcus. Meningococcus, H. influenzae type B, and group A streptococci follow in order of frequency."', 'role': 'assistant'}]