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
Thayer Main medium is used for ? 
Select and explain. 
A. Legionella, B. Meningococcus, C. Pneumococcus, D. Mycoplasma
B: Meningococcus
Answer: B: Meningococcus 
Explanation: Ans. is 'b' i.e., Meningococcus