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: Gynaecology & Obstetrics
A 55 year old woman has recurrent urinary retention after a hysterectomy done for a huge fibroid. The most likely cause is : 
Select and explain. 
A. Atrophic and stenotic urethra, B. Lumber disc prolapse, C. Injury to bladder neck, D. Injury to hypogastric plexi
B: Lumber disc prolapse
Answer: B: Lumber disc prolapse 
Explanation: Injury to hypogastric plexi