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
Bacterial genome has been completely recognised for which one of the following agents - 
Select and explain. 
A. H. pylori, B. Yersinia enterocolitis, C. Campylobacter jejuni, D. Streptococcus pneumoniae
A: H. pylori
Answer: A: H. pylori 
Explanation: None