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
A person suffers from B27 associated reactive ahritis, urethritis and conjunctivitis. Which is most likely organism involved in this case? 
Select and explain. 
A. Borrelia burgdorferi, B. Ureaplasma urealyticum, C. Beta-hemolytic streptococci, D. Streptococcus bovis
B: Ureaplasma urealyticum
Answer: B: Ureaplasma urealyticum 
Explanation: 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.