This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
50 year old male with scrotal pain for 2 days, pain decreases with elevation of testis. Clinical diagnosis is: 
Select and explain. 
A. Torsion, B. Epididymoorchitis, C. Hernia, D. Hydrocele
B: Epididymoorchitis
Answer: B: Epididymoorchitis 
Explanation: Ans. (b) EpididymoorchitisRef: Bailey 26th Edition, Page 1384* The sign demonstrated above is PREHN's SIGN* The sign is used to differentiate Orchitis and Torsion.* In Prehn's sign - Elevation of Testis reduces the pain in Orchitis.