**Core Concept**
Urinary incontinence can arise from various causes, including anatomical abnormalities, neurological disorders, and fistulas. Understanding the underlying mechanisms and structures involved is crucial for identifying the correct answer.

**Why the Correct Answer is Right**
Urinary incontinence is typically associated with conditions that compromise the normal functioning of the urinary system, such as fistulas, neurological damage, or anatomical anomalies. A rectovesical fistula, however, is a communication between the rectum and the bladder, leading to fecaluria rather than urinary incontinence. This condition is more commonly associated with complications of pelvic surgery, radiation, or Crohn's disease, and would not directly cause urinary incontinence.

**Why Each Wrong Option is Incorrect**
**Option A:** Neurogenic bladder, resulting from neurological damage or disorders, can indeed cause urinary incontinence due to the disruption of normal bladder control mechanisms.
**Option B:** A vesicovaginal fistula, a communication between the bladder and the vagina, would lead to involuntary leakage of urine, making it a correct cause of urinary incontinence.
**Option C:** An ectopic ureter, where the ureter opens abnormally, can also cause urinary incontinence, particularly in children, due to the abnormal drainage of urine.

**Clinical Pearl / High-Yield Fact**
When assessing urinary incontinence, it's essential to consider the patient's medical history, including previous surgeries, radiation therapy, or neurological disorders, as these can contribute to the development of incontinence.

**✓ Correct Answer:** D. Rectovesical fistula