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
Most common infection causing OPSI after splenectomy 
Select and explain. 
A. Streptococcus pneumonie, B. N. Meningitidis, C. E. Coli, D. Salmonella typhi
A: Streptococcus pneumonie
Answer: A: Streptococcus pneumonie 
Explanation: None