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
Bacteria showing antigenic variation ? 
Select and explain. 
A. Yersinia, B. Bordetella, C. Brucella, D. Borrelia
D: Borrelia
Answer: D: Borrelia 
Explanation: Ans. is 'd' i.e., Borrelia Bacteria showing antigenic variation are :? i) Neisseria (Meningococci, Gonococci) ii) Streptococcus spp iii) Mycoplasma iv) Borrelia burgdorferi