This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial Infection of Skin, Subject name: Skin
[{'content': 'Hot tub folliculitis is caused by: \nSelect and explain. \nA. Pseudomonas aeruginosa, B. Pityrosporumovale, C. Aeromonashydrophila, D. Vibriovulnificans', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a (Pseudomonas aeruginosa)Pseudomonas aeruginosa is an aerobic gram negative rod.It causes:ParonychiaPseudomonas otitis externaSwimming pool folliculitis Echthyma gangrenosum Treatment is ciprofloxacin', 'role': 'assistant'}]