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
Vi antigen found in - 
Select and explain. 
A. Salmonella paratyphi 'C', B. Salmonella Typhi, C. Salmonella dublin, D. All
D: All
Answer: D: All 
Explanation: Ans :D.)All The Vi antigen, is a capsular polysaccharide found mainly in Salmonella typhi and S. paratyphi C, as well as in a few strains of S. dublin and Citrobacter freundii