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
All-cause meningitis in the elderly except - 
Select and explain. 
A. HSV2, B. Pneumococci, C. Gram negative bacteria, D. Listeria
A: HSV2
Answer: A: HSV2 
Explanation: Causes of meningitis in elderly 

Pneumococci (most common)
Gram negative bacilli
Staphylococcus aureus
Meningiococci (2nd most common)
Listeria monocytogenes
Streptococcus
H. influenza
M. tuberculosis