This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal Injuries, Subject name: Orthopaedics
During Intervertebral disc prolapse, which part of the disc prolapses in spinal canal? 
Select and explain. 
A. Annulus Fibrosis, B. Nucleus fibrosis, C. Annular Pulposus, D. Nucleus Pulposus
D: Nucleus Pulposus
Answer: D: Nucleus Pulposus 
Explanation: Ans. D. Nucleus Pulposusa. Intervertebral disc is made up of two partsb. Outer-Annulus fibrosusc. Inner- Nucleus pulposusd. It is the central part of the disc i.e. nucleus pulposus, which prolapses into the spinal canal.