This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Anatomy
Notochord forms which part in postnatal life - 
Select and explain. 
A. Smooth muscles, B. Anterior longitudinal ligament, C. Nucleosus pulposus, D. Eustachian tube
C: Nucleosus pulposus
Answer: C: Nucleosus pulposus 
Explanation: Ans. is 'c' i.e., Nucleosus pulposus o After development of verteral bodies, the notochord degenerates and disappears but persists as the nucleus pulposus of intervertebral disc.