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 -a) Salmonella paratyphi 'A'b) Salmonella paratyphi 'C'c) Salmonella dublind) Kiebsiella pneumoniaee) Citrobacter fregalis 
Select and explain. 
A. bcde, B. abcd, C. abce, D. abde
C: abce
Answer: C: abce 
Explanation: Vi Antigen is possessed by S Typhi and S. Paratyphi C, S. Dublin, Citrobacter (Ballerup-Bethesda group).