**Core Concept**
The Currarino triad is a rare congenital anomaly characterized by the association of anorectal malformations, sacrococcygeal osseous defects, and presacral masses, including teratomas, meningoceles, and other types of tumors. This triad is often associated with a failure of the development of the caudal regression of the spine.

**Why the Correct Answer is Right**
The correct answer, C. Anorectal malformations + Sacrococcygeal osseous defect + Presacral mass, accurately describes the classic components of the Currarino triad. Anorectal malformations refer to a spectrum of congenital anomalies affecting the rectum and anus, including imperforate anus and rectal atresia. Sacrococcygeal osseous defects involve abnormalities in the development of the sacrum and coccyx, leading to a range of skeletal anomalies. Presacral masses, such as teratomas, can cause a variety of symptoms, including obstructive uropathy, constipation, and neurological deficits.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it includes a pre-sacral meningocele, which is not a characteristic component of the Currarino triad. While meningoceles can occur in association with other congenital anomalies, they are not a defining feature of this triad.

**Option B:** This option is incorrect because it includes ectopia vesicae (bladder exstrophy), which is a different congenital anomaly that involves the bladder and urethra. Ectopia vesicae is not a component of the Currarino triad.

**Option D:** This option is incorrect because it includes tethered cord, which is a condition where the spinal cord is abnormally attached to the spine, leading to neurological deficits. While tethered cord can occur in association with other congenital anomalies, it is not a characteristic component of the Currarino triad.

**Clinical Pearl / High-Yield Fact**
The Currarino triad is often associated with a failure of the development of the caudal regression of the spine, leading to a range of skeletal and neurological anomalies. It is essential for surgeons and radiologists to be aware of this triad to ensure accurate diagnosis and management.

**Correct Answer Line**
✓ Correct Answer: C. Anorectal malformations + Sacrococcygeal osseous defect + Presacral mass