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
[{'content': 'During Intervertebral disc prolapse, which part of the disc prolapses in spinal canal? \nSelect and explain. \nA. Annulus Fibrosis, B. Nucleus fibrosis, C. Annular Pulposus, D. Nucleus Pulposus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.', 'role': 'assistant'}]