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: Surgery
[{'content': 'Most common cause of acute epididymitis in young males \nSelect and explain. \nA. Chlamydia, B. E Coli, C. N. Gonorrhoea, D. Proteus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Young males most common organism is chlamydia\nAge > 40 most common organism is E Coli', 'role': 'assistant'}]