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': 'All of the following Salmonellae are motile except? \nSelect and explain. \nA. S. typhi, B. S. enteridis, C. S. gallinarum pullorum, D. S. chester', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., S. gallinarum pullorum * All salmonellae are motile with peritrichate flagella except S. gallinarum pullorum, which is non-motile.", 'role': 'assistant'}]