A middle-aged male patient complains of a weak "stream" and nocturia. You believe the most likely cause to be:
A) a bladder infection.
B) a spinal cord lesion affecting his pelvic splanchnic nerves.
C) benign prostatic hypertrophy.
D) a ureteric calculi.
E) an obstruction of his intramural (preprostatic) urethra.
Ans: C
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