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Which one of the following statements is...

Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?

A

It is present only in larval tail in Ascidians.

B

It is replaced by a vertebral column in frog.

C

It is absent throughout life in humans from the very beginning.

D

It is present throughout life in Amphioxus.

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The correct Answer is:
C
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