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: Unknown
[{'content': 'Which of the following bacteria is associated with bright red fluorescence under UV light? \nSelect and explain. \nA. Prevotella melaninogenica, B. Porphyromonas gingivalis, C. Pseudomonas pyocyanea, D. Yersinia pestis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (Prevotella melaninogenica) Ref:Ananthanarayan, 7th ed, p. 269 Examination of prevotella melaninogenica coming under bacteroids species shows bright red fluorescence under ultraviolet light. Porphyromonas gingivalis also coming under bacteroids sp is responsible for periodontal disease. Pseudomonas also produce a number of pigments like pyocyanin and flourescein, but bright red fluorescence under UV light is not present.', 'role': 'assistant'}]