This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
The most common organism causing meningitis is - 
Select and explain. 
A. Staphylococcus, B. Streptococcus, C. Mycoplasma, D. Pneumococcus
D: Pneumococcus
Answer: D: Pneumococcus 
Explanation: Ans. is 'D' i.e., Pneumococcus o Two most common organisms causing meningitis in adults are pneumococci and meningococci. o Group B streptococci is the most common cause of meningitis in neonates followed by E.coli.