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': 'All of the following are true about OPSI (Overwhelming Postsplenectomy Infection),Except: \nSelect and explain. \nA. Maximum risk is within 1 year of splenectomy, B. Begins with mild appearing prodrome, C. May present with septic shock, D. Usually does not respond to antibiotic treatment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]