This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
True about notochord are all except? 
Select and explain. 
A. Defines axis of embryo, B. Serves as primary inductor, C. Derived from hypoblast, D. Remains as nucleus pulposus
C: Derived from hypoblast
Answer: C: Derived from hypoblast 
Explanation: Notochord is a bud like structure formed by epiblast cells extending from cranial end of primitive streak to caudal end of prochordal plate, in between the ectoderm and endoderm. Siginificances of notochord includes following :-It defines the axis of embryo.It functions as the primary inductor, inducing the overlying ectoderm to develop into neural plate (the primordium of CNS).It serves as the basis for development of axial skeleton. The notochord is an intricate structure around which veebral column is formed and indicates future site of veebral bodies. However, the notochord does not give rise to veebral column, after development of veebral bodies, the notochord degenerates and disappears, but pas of it persist as the nucleus pulposus of interveebral disc.