**Core Concept**
Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the prostate gland, commonly affecting older men. It can lead to various urinary symptoms and complications due to its impact on the surrounding structures, including the bladder and ureters.

**Why the Correct Answer is Right**
The characteristic features of BPH include bladder trabeculations, which are thickened folds of bladder muscle due to the obstruction caused by the enlarged prostate. This can lead to a 'J' shaped or 'fish hook' appearance of the distal ureters, indicating the effect of the obstruction on the ureteral flow. Bilateral hydronephrosis may also occur as a result of the obstruction, leading to swelling of the kidneys. However, the enlargement of the lateral lobes of the prostate is not a characteristic feature of BPH.

**Why Each Wrong Option is Incorrect**
**Option A:** Increased trabeculations in bladder is a characteristic feature of BPH, as the bladder muscle thickens in response to the obstruction caused by the enlarged prostate.

**Option C:** 'J' shaped/ 'fish hook' distal ureters are also a characteristic feature of BPH, indicating the effect of the obstruction on the ureteral flow.

**Option D:** Bilateral hydronephrosis may occur as a result of the obstruction caused by BPH, leading to swelling of the kidneys.

**Clinical Pearl / High-Yield Fact**
In BPH, the bladder muscle thickens in response to the obstruction, leading to a characteristic appearance on imaging studies. This can be an important clue in the diagnosis of BPH, especially in older men presenting with urinary symptoms.

**✓ Correct Answer: B. Enlargement of lateral lobes of prostate**