This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital CNS malformations, Subject name: Pediatrics
This defect most commonly involves which region of the spine? 
Select and explain. 
A. Cervico-dorsal, B. Dorso-lumbar, C. Lumbo-sacral, D. Atlanto-occipital
C: Lumbo-sacral
Answer: C: Lumbo-sacral 
Explanation: - The given image is showing a sac of meninges with some neural component inside it. So it is a meningomyelocele. - Most common location of a meningomyelocele is lumbo-sacral region.