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: Pathology
A Person suffers from HLA B 27 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. Betahemolytic streptococci, D. Streptococcus bovis
B: Ureaplasma urealyticum
Answer: B: Ureaplasma urealyticum 
Explanation: Ureaplasma urealyticum