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
[{'content': "Vi antigen found in -a) Salmonella paratyphi 'A'b) Salmonella paratyphi 'C'c) Salmonella dublind) Kiebsiella pneumoniaee) Citrobacter fregalis \nSelect and explain. \nA. bcde, B. abcd, C. abce, D. abde", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Vi Antigen is possessed by S Typhi and S. Paratyphi C, S. Dublin, Citrobacter (Ballerup-Bethesda group).', 'role': 'assistant'}]