Task: Question Answering
Input (English): Question: Regarding benign prostatic hypertrophy, it is NOT true that: 
 Options:  <1> Abdominal ultrasound is a non-invasive method to assess prostate size and post-voiding residual. <2> It can cause increases in PSA levels. <3> Rectal examination is a method to estimate prostate size. <4> Treatment with 5-alpha reductase inhibitors decreases symptoms. <5> It is a precancerous lesion.
Output (English): 5