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: Skin
[{'content': 'A person suffers from B27 associated reactive ahritis, urethritis and conjunctivitis. Which is most likely organism involved in this case? \nSelect and explain. \nA. Borrelia burgdorferi, B. Ureaplasma urealyticum, C. Beta-hemolytic streptococci, D. Streptococcus bovis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Agents responsible for Reiter's syndrome: Salmonella enteritidis S. typhimurium S. heidelberg Yersinia enterocolitica Y. pseudotuberculosis Campylobacter fetus Shigella flexneri Genitourinary pathogens (such as Chlamydia or Ureaplasma urealyticum) Ref: Suurmond D. (2009). Section 14. The Skin in Immune, Autoimmune, and Rheumatic Disorders. In D. Suurmond (Ed), Fitzpatrick's Color Atlas & Synopsis of Clinical Dermatology, 6e.", 'role': 'assistant'}]