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
Causes of acute retention of urine include all/except: 
Select and explain. 
A. Meatal ulcer with scabbing in children, B. Haemorrhoidectomy, C. Herniorraphy, D. Fecal impaction
C: Herniorraphy
Answer: C: Herniorraphy 
Explanation: None