**Core Concept**
Ectopia vesicae, also known as bladder exstrophy, is a rare **congenital anomaly** where the bladder is open and exposed on the abdominal wall due to a defect in the **lower abdominal wall**. This condition is often associated with other **genitourinary** and **musculoskeletal anomalies**.

**Why the Correct Answer is Right**
The correct answer cannot be determined without the options, however, typical features of ectopia vesicae include an exposed bladder, **epispadias**, and **public bone diastasis**. The condition results from an abnormal development of the **cloacal membrane** during embryogenesis.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, it's impossible to provide a detailed explanation.
**Option B:** Similarly, without the option, we cannot explain why it's incorrect.
**Option C:** This option would be incorrect if it described a typical feature of ectopia vesicae.
**Option D:** This option might be incorrect if it mentioned something unrelated to the condition.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that ectopia vesicae is often associated with other congenital anomalies, and **surgical reconstruction** is usually necessary to correct the defect and improve the quality of life for the patient.

**Correct Answer:** D. Absence of testis