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
Risk of pneumococcal meningitis is seen in - 
Select and explain. 
A. Post splenectomy patient, B. Patient undergone neurosurgical intervention, C. Patient following cardiac surgery, D. Patient with hypoplasia of lung
A: Post splenectomy patient
Answer: A: Post splenectomy patient 
Explanation: None