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
Most common cause of acute epididymitis in young males 
Select and explain. 
A. Chlamydia, B. E Coli, C. N. Gonorrhoea, D. Proteus
A: Chlamydia
Answer: A: Chlamydia 
Explanation: Young males most common organism is chlamydia
Age > 40 most common organism is E Coli