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: Medicine
[{'content': '30 Yr old man which is most likely organism causing infection of epididymis - \nSelect and explain. \nA. E.coli, B. Gonococci, C. Chlamydia, D. Ureaplasma ureolyticum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]