This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Anatomy
[{'content': 'Green nail syndrome is caused by \nSelect and explain. \nA. Psedomonas aeruginosa, B. Pleisomonas, C. Aeromonas, D. Burkholderia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is a paronychia ( inflammation of the tisseues adjacent to the nail with green pus formation) . It results from prolonged submersion of the hands in water.', 'role': 'assistant'}]