Failure of the neural tube to close completely during embryonic development, particularly in the lumbosacral region, resulting in exposure of the spinal cord and meninges, is characteristic of which congenital anomaly?

✓ Correct Answer: Option C

Myelomeningocele is the most severe form of spina bifida, resulting from incomplete neural tube closure. It involves herniation of both meninges and neural tissue through a vertebral defect, leading to neurological deficits.