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
Which of the following is the most common cause of delayed urinary tract obstructive symptoms after TURP? 
Select and explain. 
A. Bladder neck stenosis, B. Stricture of the membranous urethra, C. Stricture of the membranous urethra, D. Stricture of the navicular fossa
A: Bladder neck stenosis
Answer: A: Bladder neck stenosis 
Explanation: Ans is 'a' i.e. Bladder neck stenosis "The risk of developing an urethral stricture is 2.6% after open prostatectomy, 3.8% after TURP and 1.7% after TUIP (4-11). The risk of bladder neck contracture is 1.8% after open surgery, 4% after TURP and 0,4% after TUIP. "- European Association of Urology 2006