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': 'In pontaic fever, which antigen is seen in urine? \nSelect and explain. \nA. Lipopolysaccharide-1, B. Lipopolysaccharide-2, C. Lipopolysaccharide-4, D. Lipopolysaccharide-6', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Lipopolysaccharide-1 Legionella are classified into serogroup on the basis ofgroup specific lipopolysaccharide (somatic antigen or 'O' antigen). Legionella pneumophila sero-group-1 (LP-1) is the most common infecting organism. Urine test detect LP-1.", 'role': 'assistant'}]